Shanbo Heinemann, a pro-Palestinian activist from San Francisco, California, sits on the ground after being shot in the head with a rubber bullet fired by Israeli troops during a violent protest against Israel's security fence in the West Bank village of Bilin, February 22, 2008.Slideshow (graphic): http://www.reuters.com/news/pictures/slideshow?collectionId=1604&galleryName=All%20Collections#a=1