Thinking you could get battery power on board a plane now and do damage? or some other triggering device. there have been cellphone bombs used in the past famously in 1996 but they have not been used often. the fear is al qaeda allies in syria have worked on now bomb designs. they are the ones that brought you the underwear bombs. you would think they would be focused on isil rather than attacking the u.s. homeland and dhs isn t saying this is imminent and not to panic, but if there is something to this, you almost wonder whether the recent success in iraq have pushed their al qaeda competitor