What GAO Found
Since the Transportation Security Administration (TSA) implemented its expedited screening program—known as TSA Pre✓TM in 2011, the number of passengers receiving expedited screening grew slowly, and then increased about 300 percent in October 2013 when TSA expanded its use of methods to increase passenger participation, such as conducting automated risk assessments of all passengers. In conducting these assessments, TSA assigns passenger scores based upon information available to TSA to identify low risk passengers eligible for expedited screening for a specific flight prior to the passengers’ arrival at the airport.
To assess whether a passenger is eligible for expedited screening, TSA considers (1) inclusion on an approved TSA Pre✓TM list of known travelers; (2) results from the automated risk assessments of all passengers; and (3) threat assessments of passengers conducted at airport checkpoints known as Managed Inclusion. Managed Inclusion uses several layers of security, including procedures that randomly select passengers for expedited screening, behavior detection officers who observe passengers to identify high-risk behaviors, and either passenger screening canine teams or explosives trace detection devices to help ensure that passengers selected for expedited screening have not handled explosive material. Prior to Managed Inclusion’s implementation, TSA relied primarily on approved lists of known travelers to determine passenger eligibility for expedited screening.
TSA has tested the effectiveness of individual Managed Inclusion security layers and determined that each layer provides effective security. GAO has previously conducted work on several of the layers used in the Managed Inclusion process, raising concerns regarding its effectiveness and recommending actions to TSA to strengthen them. For example, in January 2013, GAO recommended that TSA take actions to comprehensively assess the effectiveness of canine teams. TSA subsequently addressed this recommendation by conducting the assessment. In October 2014, TSA planned to begin testing Managed Inclusion as an overall system, but could not provide specifics or a plan or documentation showing how the testing is to be conducted, the locations where it is to occur, how these locations are to be selected, or the timeframes for conducting testing at each location. Moreover, GAO has previously reported on challenges TSA has faced in designing studies to test the security effectiveness of its other programs in accordance with established methodological practices such as ensuring an adequate sample size or randomly selecting items in a study to ensure the results can be generalizable—key features of established evaluation design practices. Ensuring its planned testing of the Managed Inclusion process adheres to established evaluation design practices will help TSA provide reasonable assurance that the testing will yield reliable results.
This is a public version of a sensitive report that GAO issued in September 2014. Information that the Department of Homeland Security deemed sensitive has been removed.
Why GAO Did This Study
TSA screens or oversees the screening of more than 650 million passengers annually at more than 450 U.S. airports. In 2011, TSA began providing expedited screening to selected passengers as part of its overall emphasis on risk-based security. Specifically, by determining passenger risk prior to travel, TSA intended to focus screening resources on higher-risk passengers while expediting screening for lower-risk passengers.
GAO was asked to determine how TSA implemented and expanded expedited screening via TSA Pre✓TM. This report examines, among other things, (1) how TSA has developed, implemented, and used expedited screening, (2) how TSA assesses passenger risk, and (3) the extent to which TSA has determined the Managed Inclusion system's effectiveness. GAO analyzed TSA procedures and data from October 2011 through January 2014 on expedited screening and interviewed officials at TSA, airport authorities, air carriers, and industry associations about expedited screening.
GAO recommends that TSA take steps to ensure and document that its planned testing of the Managed Inclusion system adheres to established evaluation design practices, among other things. DHS concurred with GAO's recommendations.
Recommendations for Executive Action
|Transportation Security Administration||To ensure that TSA's planned testing yields reliable results, the TSA Administrator should take steps to ensure that TSA's planned effectiveness testing of the Managed Inclusion process adheres to established evaluation design practices.|
|Transportation Security Administration||To ensure that TSA has accurate information by which to measure the performance of its expedited screening programs, the TSA Administrator should ensure that the expedited screening performance goals and measures align.|