Americans view terrorism, Iran and North Korea as the top military threats facing the country according to a new Gallup poll:
There is an age gap when it comes to Iran, with Gallup noting that older Americans are more likely to view Iran as a threat and Americans 18-29 considerably less concerned. Gallup doesn't ask, but it would be nice to dig a bit deeper and ask what people think Iran is likely to do. Being a "threat" is a fairly amorphous thing.