david, homemade bomb. those are the key words there. what does this tell us about the abilities of isis? it doesn t tell us a lot yet. the reason why is we don t know the design of the bomb. a dispute of the act of terrorism. some officials are confused by what had gone on. in the american s case, they unwisely leaked the information which was a big mistake. what that suggests is that design is not a typical design. secondly, it is important to note in addition to isis in iraq and syria, you have the local affiliate called walid-sinai and you have a control of the city of sirt. you have several emanating from several geographic areas. two clues or do you dismiss? one is the lighter the bomb, the