Report To Congressional Requesters National Airspace System -

u s news latest national news videos photos abc - get the latest breaking news across the u s on abcnews com, u s military response during the september 11 attacks - radar tracking the hijackers of the four planes switched off the transponders or changed their codes upon taking control making it difficult to track them on radar, evaluation of the air cargo security program transport - the senate standing committee on national security and defence catsa act review panel and the air india commission all identified cargo as a relative weak point in the civil aviation security system since 2006 transport canada with the support of the canada border services agency cbsa has