An AWOL Navy Officer based at Camp Pendleton has allegedly made a bomb threat against San Clemente High School, and school officials have put the campus on lock down. The Orange County Sheriffβs Department told KABC-TV that when a Navy officer was reported missing, base officials searched his home and found a note that claimed heβd put an explosive device on San Clemente High School grounds. Today was the first day of school at the campus.