U.S. Marine Lance Cpl. John Jones, a sentry with the Provost Marshal’s Office, Security and Emergency Services Battalion, Marine Corps Base Camp Pendleton, practices cardiopulmonary resuscitation as part of a pre-service training course at the Military Police Training Facility on Camp Pendleton, California, Feb. 18. - U.S. Marine Lance Cpl. John Jones, a sentry with the Provost Marshal’s Office, Security and Emergency Services Battalion, Marine Corps Base Camp Pendleton, practices cardiopulmonary resuscitation as part of a pre-service training course at the Military Police Training Facility on Camp Pendleton, California, Feb. 18.