Defense Secretary Robert M. Gates observes Marine recruits carrying their cohorts at the Combat Conditioning Field, Marine Corp Recruit Depot in San Diego, Aug. 13, 2010. Defense Secretary Robert M. Gates observes Marine recruits carrying their cohorts at the Combat Conditioning Field, Marine Corp Recruit Depot in San Diego, Aug. 13, 2010. SHARE: Download: Full Size (9.48 MB) Tags: Photo Essays Credit: VIRIN: 019040-X-SUF30-918.jpg Photo Gallery