Bomb implants may pose new threat July 7, 2011 at 3:50 PM CDT - Updated June 24 at 3:31 PM DETROIT (WDIV/CNN) - Passengers flying to the U.S. from other countries may have to go through extra security at the airport soon. A U.S. security source told CNN there's new concern terrorists may have explosives surgically implanted inside their bodies. The official said there's new intelligence pointing to a possible new technique that could be used, but said no attack appears imminent. According to the Transportation Security Administration (TSA), U.S. officials warned airlines and U.S. allies last week that aviation remains a terrorist target. Copyright 2011 WDIV via CNN. All rights reserved.