Man Versus Shark

Oct. 22, 2010: This photo provided by the Santa Barbara County Sheriff's Department shows the bite of a shark on a boogie-board on which Lucas Ransom, 19, was killed in a shark attack. (AP)

In this July 6, 2007 photo, Lucas Ransom is seen in Murrieta, Calif. (AP)

Oct. 22, 2010: Santa Barbara County Sheriff's Deputy Frank Vasquez walks the beach near scene of the fatal shark attack. (AP)

Oct. 22, 2010: Airmen 1st class Daniel Clark, left, and Staff Sgt. Keri Embry, post a sign warning surfers of the shark attack. (AP)

Oct. 22, 2010: A close-up photo of Ransom's boogie-board shows the enormous shark bite that ultimately killed the 19-year-old. (AP)