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ihs janes. what else can go wrong? >> jamming. >> reporter: hacking? >> hacking. trying to take down the system, just cutting on off the signal. weather even dogs the u.s. military uavs in combat. i think there's also the potential for these things getting shot down. >> reporter: then there's the accuracy question. will the package be dropped at your book door or end up on the roof? could it be stoleling? if those obstacles are overcome, are we going to be living out the old cartoon "the jetsons" with future risic vehicles taking up our airspace? experts say that's a long way away. first xwe southeast has to have american law on his side. right now the faa doesn't allow drones to be flown for commercial purposes or outside the operator's line of sight. in 2015, the faa will have new regulations. that kind of drone flying might be allowed.