We're facing an absolute glut of alien invasion movies at the moment, with the latest to arrive showing a full on assault on the world. Invasion: Los Angeles looks like good fun, but it does raise the question, what would our chances really be if aliens invaded. John Alexander, a retired Army colonel who has written a book about UFO's thinks we've had it, though I strongly agree with his stance that man on alien hand to hand combat is pretty unlikely. We are much more likely to be wiped out by an alien manufactured virus (assuming they want to claim a pristine uninhabited world for themselves) or they'll just sit up in orbit and pound us into submission without risk to themselves. There's a right up on the likely battle plans of alien invaders on AOL News.