Has the alien invasion already begun? Come with us as we take a look at some of the best aliens caught on tape. We examine the most convincing video evidence of extraterrestrials visiting Earth. From a man who supposedly killed an alien, to alleged aliens caught on CCTV security camera, there are some very mysterious alien sightings that have been caught on tape. What do you think? Are aliens visiting Earth? Are these videos of aliens caught on tape real?