Emergency workers mark off the crash site of United Airlines Flight 93 near Somerset, Pa., Tuesday, Sept. 11,2001. The Boeing 757 took off from Newark, N.J., enroute to San Francisco when it crashed in a wooded area 12 miles north of Somerset, Pa. Authorities said there were no survivors. The crash was one of four reported Tuesday by United and American Airlines. Two jetliners crashed into the World Trade Center in New York City and one hit the Pentagon in Washington. (AP Photo/Tribune-Review, Scott Spangler)