30 must-see alien invasion movies
Let's face it — extra terrestrials are scary. Most of the following films don't typically portray our Galaxian brothers and sisters as cute, E.T.-like creatures. Often, they're evil, blood-sucking, and anxious to steal our beautiful Earth men and women.
As "Men in Black 3" invades theaters, here are 30 great invasion films. Don't call it entertainment — call it survival research for when aliens attack!