The answer, fortunately, is not a live-action “War of the Worlds”. As far as we know, there isn’t a Martian insurgency in Florida. Instead, the MRAP is a safety precaution, should disaster strike the launch pad--for example, if a rocket is about to blow up. MRAPs are heavy, weighing in at around 45,000 pounds, and their armor is thick. This is important for war, but it also means that if astronauts have to get off the launch pad quickly, the MRAP can function as a moving bunker, traveling between 45 and 50 mph.