South Africa Chimp Attack on Texas Grad Student Called 'Territorial Defense'

The alpha chimps are said to be six times stronger than humans. What's amazing is that these two pulled the victim, Andrew Oberle, under an electrified fence and then dragged him for a half a mile.

See London's Dail Mail, "American student mauled by two chimpanzees in South Africa was a victim of 'territorial defense'."

And at CNN, "U.S. student has surgery after savage attack by chimps."