United States Government Publishing Office publisher pbl distributor dst United States Government Accountability Office author aut Government Organization text government publication eng GAOREPORTS Legislative Agency Publications gao legislative 2010-08-12 U.S. Government Printing Office 2007-04-16 monographic deposited born digital 77 p. GA 1.13:GAO-07-634 https://www.govinfo.gov/app/details/GAOREPORTS-GAO-07-634 P0b002ee180387e81 f:d07634 DGPO 2010-08-12 2011-03-28 GAOREPORTS-GAO-07-634 machine generated eng fdlp REPORT GAOREPORTS-GAO-07-634 GAO-07-634 Airport security Aviation security Baggage screening Commercial aviation Documentation Evaluation methods Homeland security Modifications Passenger screening Performance measures Program evaluation Risk assessment Terrorism Transportation policies Policies and procedures Other Written Product A68225 The Transportation Security Administration's (TSA) most visible layer of commercial aviation security is the screening of airline passengers at airport checkpoints, where travelers and their carry-on items are screened for explosives and other dangerous items by transportation security officers (TSO). Several revisions made to checkpoint screening procedures have been scrutinized and questioned by the traveling public and Congress in recent years. For this review, GAO evaluated (1) TSA's decisions to modify passenger screening procedures between April 2005 and December 2005 and in response to the alleged August 2006 liquid explosives terrorist plot, and (2) how TSA monitored TSO compliance with passenger screening procedures. To conduct this work, GAO reviewed TSA documents, interviewed TSA officials and aviation security experts, and visited 25 airports of varying sizes and locations. https://www.govinfo.gov/content/pkg/GAOREPORTS-GAO-07-634/html/GAOREPORTS-GAO-07-634.htm https://www.govinfo.gov/content/pkg/GAOREPORTS-GAO-07-634/pdf/GAOREPORTS-GAO-07-634.pdf GAO-07-634 https://www.govinfo.gov/app/details/GAOREPORTS-GAO-07-634 Other Written Product GAO-07-634; Aviation Security: Risk, Experience, and Customer Concerns Drive Changes to Airline Passenger Screening Procedures, but Evaluation and Documentation of Proposed Changes Could Be Improved; Airport security Aviation security Baggage screening Commercial aviation Documentation Evaluation methods Homeland security Modifications Passenger screening Performance measures Program evaluation Risk assessment Terrorism Transportation policies Policies and procedures Volume 115 Page 597 115 Stat. 597 Public Law 107-71