Scientists look to explain animals' disaster response

In Khao Lak, 50 miles north of Phuket along Thailand's western coast, a dozen elephants giving tourists rides began trumpeting hours before the Dec. 26 tsunami - about the time the 9.0-magnitude quake fractured the ocean floor. An hour before the wall of waves slammed the resort area, the elephants reportedly again grew agitated and began wailing. Just before disaster struck, they headed for higher ground - some breaking their chains to flee.