UK Daily Mail 
July 22, 2013
The head of the Transportation Safety Administration (TSA) said Friday that underwear bombers are still a concern.
Speaking at the Aspen Security Forum, TSA chief John Pistole said al Qaeda has retooled its underwear bomb designed to take planes down over the United States.
Airport security systems had to be modified after a double agent discovered exposed the second iteration of the device last year, Pistole said during a question and answer session moderated by ABC reporter Brian Ross.