why would that be reasonable? US is not constantly under attack, neither is any other country. But Earth IS constantly bombarded by meteors, so it's completely

why would that be reasonable? US is not constantly under attack, neither is any other country. But Earth IS constantly bombarded by meteors, so it's completely reasonable to expect that once in a while a meteor will be big enough to become a glowing ball, instead of expecting a random ICBM. Not to mention ICBMs don't burn up in the atmosphere. Really the idea that at any moment there can be an ICBM coming your way and it will look like this is totally ridiculous and only created by fearmongering TV news. Real world is elsewhere. On a similar note - the number of people asking about ICBMs every time SpaceX has a twilight launch... facepalm