North Korean and South Korean and USA at War?

Ok friends. This is serious. We can possibly be in a brink of war. You see I fear the most is that Kim Jong ill Taepodong, that is the only thing I fear about korea. As crazy as he is. Will Taepodong be as dangerous as landing in California or Washington? And the radioative will it travel and tore most states apart? Is it that powerful? And if we do have war with North Korean you think will their be a chance for North Korean airplane to enter USA? Or will our USA defense so great that a small North Korean have no chance? Please be real and put the joke aside. I will report you with question that our not appropriate. Thanks.