Teen injured at Calif. camp heard crack, screaming - Article Photos 4/4

A tree service vehicle arrives at Camp Tawonga in Groveland, Calif., Wednesday, July 3, 2013. Four adults were injured and one remained unaccounted for after a large oak tree fell Wednesday at a summer camp near Yosemite National Park, authorities said. No children were hurt. The tree took down power lines but did not fall on any buildings at Camp Tawonga in rural Tuolumne County, sheriff's spokesman Sgt. Jim Oliver said. (AP Photo/The Sonora Union Democrat, Maggie Beck)