This might seem something silly, but did any of you hear about the plot to kill the Saudi Ambassador on the news? The guy was apparently charged with wanting to use Weapons of Mass Destruction and now every night I keep thinking that terrorists want to nuke London. How and try to stop these thoughts? It really frightens me (naturally, I wouldn't want to be evaporated) and I just get so freaked out. The probability of it happening on any day is small but that doesn't seem to help. Any tips?