Marines from various units stationed at Camp Pendleton, Calif., compete in San Francisco Fleet Week's TRX challenge in San Francisco, Oct. 6. The 24 Hour Fitness president and former Naval officer, Carl Liebert, and TRX CEO and inventor Randy Hetrick, a former Navy seal, raised $6,600 for the Semper Fi Fund, a Camp Pendleton-based nonprofit organization that provides assistance to families of service members who are killed or wounded in combat.