but congressional leaders and administration leaders say they want to investigate this. two parts to the investigation, could it have been detected and how much damage could it have been done? reporter: of course, in terms of could it have been decked, it doesn t really present any challenge different than the first underwear bomb that was brought over successfully into a plane in 2009, although it didn t go off as designed. it s basically the same design. both were nonmetallic. these are pictures of the 2009 device. both had high explosives in them, different chemicals, better detonator, apparently, this time. but in terms of detecting it, it doesn t present any different challenge to screeners than the first one did because they both were nonmetallic. could it have been detected? maybe, maybe not by the screening machines. but homeland security says if you combine the screening machines with other protocols, intelligence, background of passengers, they feel relatively