Response to: “Oops: Backscatter X-ray machines tear apart DNA"

This article has been receiving quite a bit of attention and it’s leading people to believe the Backscatter Advanced Imaging Technology (AIT) used by TSA emits terahertz radiation. Recent studies are showing that terahertz radiation may “unzip double-stranded DNA, creating bubbles in the double strand that could significantly interfere with processes such as gene expression and DNA replication.”

(I know… who knew that your DNA could be unzipped? Hey buddy, your barn door’s open!!!)

I forwarded the article around to a few subject matter experts here at TSA and was provided with some interesting information:

“TSA has not tested nor procured any terahertz AIT systems.”

That sentence should sum it up for most of our readers, but for those who like to get into the weeds, here is some more interesting information that was given to me from the fine folks at the Office of Security Technology (OST):

The Transportation Security Administration (TSA) has assessed multiple types of AIT systems including X-ray backscatter and millimeter wave. Both offer safe and effective whole body screening for weapons and explosives concealed on a person’s body. Backscatter X-ray technology uses X-rays that penetrate clothing, but not skin, to create an image. Millimeter wave technology uses sensors to collect millimeter wave energy to measure the difference in radiated energy relative to each object against a common background (the human body produces these signatures in typical screening applications) to construct a composite image.

Backscatter - Relies on a narrow, low intensity X-ray beam scanned over the body’s surface at high speed that is reflected back from the body and other objects placed or carried on the body, where it is converted into a computer image of the subject and displayed on a remote monitor. For comparison purposes, the X-ray dose received from the backscatter system is equivalent to the radiation received in two minutes of airplane flight at altitude (.04 millirem by backscatter (2 scans) compared to .0552 millirem for two minutes of flight). Newer technologies require less scanning time, reducing individual X-ray exposure to .002 millirem for the entire process. The backscatter AIT meets and exceeds the American National Standards Institute (ANSI) standard for personnel security screening systems using X-rays.

Millimeter Wave - Uses non-ionizing radio frequency energy in the millimeter wave spectrum to generate an image based on the energy reflected from the body. The frequency range for millimeter wave technology exists in the range between 30-300 gigahertz. The three-dimensional image of the body is displayed on a remote monitor for analysis. The energy projected by the system is 10,000 times less than a cell phone transmission (.00000597 mW/cm2 for millimeter wave technology compared to 37.5 mW/cm2 for a cellphone).

Other Safety Information

“TSA security screening technologies are required to meet consensus standards, such as those issued by the American National Standards Institute (ANSI), as well as regulatory requirements such as those issued by the Food and Drug Administration (FDA). Our systems are independently tested as well by such laboratories as Johns Hopkins Applied Physics Laboratory (APL) and the National Institute for Standards and Technology (NIST) and FDA. We also apply an aggressive maintenance program to ensure that these systems continue to meet these performance standards. Additionally, TSA Occupational Safety Health and Environment (OSHE) is an active participant in our project integrated project teams. TSA OSHE assists in the development and validation of technology safety requirements. We also conduct safety evaluations as part of our laboratory, TSA Systems Integration Facility (TSIF), operational and site acceptance testing procedures.”

TSA tells its employees, namely Transportation Security Officers (TSOs), about the safety of advanced imaging technology machines, including the radiation exposure, during training on the equipment. In addition, TSA’s Office of Occupational Safety Health and Environment has individuals who work directly with TSOs to communicate safety information about operating the equipment. Information is available to TSOs through the OSHE Web site and employees can contact members of OSHE directly with questions.

Thanks,

Blogger Bob

TSA Blog Team

Response to "TSA Takes Big Gulp over Britney"

Photo Courtesy of Steven Depolo

A video was posted earlier today by a popular celebrity tabloid showing Britney Spears traveling through airport security at LAX with a large drink cup.

We checked with the airport and I'm happy to report there's nothing to see here.

Her cup had a few ice chips in it, not liquid. Ice is a solid. Therefore, ice is permitted through the checkpoint, as long as it's screened by the X-ray (Which it was).

I should also add that Ms. Spears did have a bottle of liquid in her purse which was identified on the X-ray and voluntarily surrendered at the checkpoint.

One thing to remember when bringing ice through the checkpoint: it can't be partially melted. It has to be just the ice with no liquid at the bottom.

While I'm at it, I'll take this opportunity to answer a common question. Yes, empty bottles and cups are also allowed through the checkpoint.


*** Update: 11-4-09 ***
After reading the incoming comments this morning on our blog, it was very apparent that we had left some inaccurate information on the TSA.gov web page:

"Frozen gels/liquids are permitted if required to cool medical and infant/child exemptions. Frozen gels/liquids for any other purpose are not permitted."

This information has recently changed and should have been updated. An update has been posted in its place.

If you encounter any problems, please contact a TSA Customer Support Manager by using the Got Feedback? program.

***Update 11/6/2009***

Clarification on Frozen Liquids… and Britney

Earlier this week, Britney Spears came through a checkpoint at LAX. The paparazzi were there taking pictures and presumed they landed a big story when they saw what they thought was TSA giving Ms. Spears the “celebrity treatment.” They presumed the cup in her hand was a full beverage. It was also assumed that we let Ms. Spears through the checkpoint with her beverage instead of prohibiting it, which led to allegations of TSA just letting her slide by.

What really happened was Ms. Spears had a cup with a few ice chips. Ice and other frozen solid liquids are permitted as long as they’re frozen solid and X-ray screened.

So, why are frozen solidified items permitted when they’re eventually going to melt once the passenger is in the gate area or on their flight? Good question. It is highly improbable that the explosives TSA is concerned about could be frozen by traditional means. The key word here is frozen. Not thawing. Not a slush or slurry. Frozen solid.

I’ve read comments saying things similar to “Huh, but you wouldn’t let me bring my [Insert Frozen Item Here] before… what’s the deal?” As a result of many questions from our officers on the front lines, we previously clarified the treatment of solidified liquids through internal processes.

So, while something may have been prohibited by an officer in the past, it may not be now. Please remember that even permissible items get a closer look at times, so don’t be surprised if we take a closer look. So you might want to think twice before going overboard and freezing your entire pantry or medicine cabinet and packing it in your carry-on.

Another question that comes up is “Why not just ban all liquids?” Another great question… I just answered this recently, so excuse me while I cut and paste. At first, all liquids were banned. This wasn’t sustainable long term. People have liquid medications and mothers need to travel with breast milk and formula, etc. So, using the intelligence at hand, it was determined how much liquid could be allowed on planes by a passenger so that we could balance security with convenience. Hence 3-1-1… TSA is now working on technology that will hopefully bring an end to it – so that liquids could be screened along with everything else in your bag – and no little plastic baggie. The day that technology allows liquid to stay in your bags, our HQ will look like a vintage victory parade. Tickertape will be streaming out of our windows and bands will be marching around the building.

You have to keep in mind that these procedures were put in place to as an effective measure until the necessary technology can be deployed. 3-1-1 was never intended to be the perfect permanent fix. There is still a lot of work to be done on this and we are as disappointed as you are that the technologists have not been able to find solutions as quickly as we had hoped. Remember that 3-1-1 is in use throughout most of the world and all of our counterparts are working on a solution as well.

Now back to Britney…

Some of you are saying our officers were star struck and gave Ms. Spears special treatment and didn’t even X-ray her bags. First off, this is LAX. Our officers are pretty accustomed to screening celebrities, so I doubt they get star struck. Secondly, if you watch the TMZ video, you’ll notice that her purse is brought over first by a TSO.

There ‘s an opening on all of our X-rays that is next to the X-ray operator and allows a bag search officer to grab the bag as it comes out of the X-ray. This prevents bags that need inspected from getting to the passenger and causing a security breach. That opening is not visible on the TMZ video, but here is a picture.

OK, when the purse is brought to her, watch her expression. You’ll see an “Oops I did it Again” expression as she is informed that she has a bottle of perfume in her purse. (Which she voluntarily surrenders) Next you’ll see an officer bring the bin to her with the cup in it. Notice the officer to the left looking over the bin to inspect it. That’s when it was confirmed that there were just a few ice chips in her cup. (After it had already gone through the X-ray) There is no straw and you can clearly see her get an ice cube out of the cup and not a drink.

Blogger Bob

TSA Blog Team

Response to “Bag Check” Cartoon

On the surface, this cartoon resonates with many passengers who’ve had to abandon their liquids or adjust their travel to adhere to TSA’s 3-1-1 liquid policy.

This cartoon compares the allowance of laptop batteries with a bottle of water. It leads the reader to believe batteries are more dangerous than the water. While that might be true, it leaves out the reasoning behind 3-1-1. The batteries may be more dangerous than a bottle of water, but they are not more dangerous than a water bottle filled with liquid explosives.

When you show us a bottle of liquid, we can’t tell if it’s a sports drink or liquid explosives without doing a time consuming test on it. We’re developing the proper technology to allow us to expedite the screening of all liquids, but in the meantime, to screen everybody’s various types of liquids over 3.4 oz. would cause gridlock at the checkpoints.

Why is 3.4 oz. and below OK and what’s up with the baggies? To date, I think those questions were answered best in an interview with Ars Technica’s Jon Stokes. I highly suggest you read it to get the big picture of what lead to 3-1-1.

Additional information on Lithium (laptop) batteries: They’re permissible in checked and carry-on luggage when they’re in the devices they are intended for. Spare batteries are not permissible in checked baggage, but they can be transported in your carry-on luggage if they are packaged properly.

You can read more about the Federal Aviation Administration’s (FAA) rules on traveling with batteries at the SafeTravel web page.

(Cartoon Courtesy of XKCD)

Thanks,

Blogger Bob

TSA Blog Team

Response to “My Daughter the Terror Suspect”

I came across a post yesterday about a cute little four year old girl who was believed to be on the No Fly List because every time she flies with her father, he has to check in at the ticket counter and can’t print tickets from home or from a kiosk. The author also described that even though his daughter had a nuclear meltdown at Target, she was by no means a terrorist.

I can relate to nuclear meltdowns at Target since my daughter had one there last year. I carried her out of the store like a sack of potatoes and she was screaming all the way. I really expected somebody would call the police, but they didn’t.

It may seem like semantics here, but first off, I wanted to let you know that your daughter is not on the No Fly List. It sounds as if her name is a match or similar match to an actual individual on the Selectee Watch List. You can’t obtain a boarding pass if you’re on the No Fly List. If you’re on the Selectee Watch List, you can fly after you’ve received additional screening.

Many have been misidentified as a match or possible match for the Selectee Watch List and the only thing they could do is work with the Redress Office to correct the problem.

But who is that I see? Is it a bird? Is it a plane? No, It’s Secure Flight! Airlines are beginning to ask for name, date of birth, and gender as it appears on the government ID you plan to use when traveling. This is a part of the Secure Flight program. The program will be in full effect for domestic airlines by the first quarter of 2010 and the rest of the airlines will be on board by the end of 2010. It will reduce mismatched names by 99.9%.

So, this will not be a problem in the future.

In the short term, individuals who have been misidentified as a match or possible match for a Watch List can work through the DHS Redress process to resolve the issue.

Secure Flight Related Posts on the TSA Blog

Thanks,

Blogger Bob

TSA Blog Team

Why We Screen Wheelchairs Part II

Our officers work in what some have referred to as a large fishbowl. Everything they do is being observed by passengers. So, when they screen veterans & active military, children & seniors, and people in wheelchairs, people notice. It doesn’t sit well with them and we often hear about it. All wheelchairs must be screened and it's important to remember that some people, including terrorists are looking to sneak things through, by pretending to have a disability.

Lynn wrote the last “Why We Screen Wheelchairs” as a result of a passenger trying to smuggle two packages of cocaine onto a plane. Wherever you can hide drugs, you can hide bombs and other items, so we thought it was a good example to help explain why we screen people in wheelchairs.

In this most recent case, a gentleman came through the checkpoint at Milwaukee’s MKE airport in his wheelchair and whoops -what’s that??? Underneath the cushion of his wheelchair was not one, but two firearms. Our officers found the following:

- One 9mm loaded with 15 rounds and one chambered

- One 32 caliber loaded with seven rounds and one chambered

It turns out that the gentleman didn’t have any nefarious intentions(He forgot the guns were there) but it is yet again another example of why we screen wheelchairs and the people in them.

To help us better understand how to screen persons with disabilities (PWDs), TSA established a coalition of over 70 disability-related groups and organizations with disabilities and medical conditions. These groups have assisted TSA with writing our policies to help us thoroughly screen PWDs while ensuring they are treated with dignity and respect. Our officers are regularly trained on screening people with disabilities.

You can go to TSA.gov to read more about traveling when you have a disability.

Blogger Bob

TSA Blog Team

Response to "TSA Agents Took My Son"

A blog post has been circulating today from a woman who wrote a very emotional story about being separated from her child while traveling through a TSA check point. Two things went through my mind after reading her post.

1. As a father of two small children, I empathized with her about the alleged circumstances.
2. As a TSA employee and former TSO, I felt it could not be true -- especially since our policy is that TSA will not ask parents to do anything that would distance them from their children during the screening process.

TSA works daily to achieve the balance of effective security and passenger convenience. We diligently review claims of improper conduct. But when inaccurate passenger accounts are made either via media outlets or on the blogs, TSA works to resolve them and present both sides of the story. In this case, TSA has made the decision to post the CCTV video of the incident online to allow for transparency.

After watching the video footage, you'll see the video clearly shows that this individual was never separated from her baby by TSA. You'll also see that a lot of the other claims are also unfounded.

Blogger Bob
TSA Blog Team

***Update - 10/18/09 - 7:00 PM***

On Friday, TSA posted the video footage pertaining to the portion of the process where the individual said that TSA removed her child from her presence. There are 9 camera angles of the incident which were placed into sequence to show the time frame in question. For full transparency, TSA is posting the entirety of the footage from each camera of the entire time the passenger was within camera range at the checkpoint.

Part 1 - Entering Checkpoint

Part 2 - Loading Items on X-ray

Part 3 - Waiting to be Screened (Different Angle)

Part 4 - Waiting to be Screened

Part 5 - Walking to Screening Area

Part 6 - Security Screening

Part 7 - Security Screening (Different Angle)

Part 8 - Exiting Checkpoint

Part 9 - Exiting Checkpoint (Different Angle)

Also, TSA's Atlanta Federal Security Director and the TSA blog team reached out to the individual on behalf of TSA on more than one occasion regarding the incident and have not heard back.

The individual has also acknowledged on her blog that this is her in our CCTV footage.

Thanks ~ Blogger Bob