U. S. Marine Corps Lieutenant General John Toolan, left, commanding general of I Marine Expeditionary Force (I MEF), observes a simulated surgery in the field operating room established by Bravo Surgical Company, 1st Medical Battalion, 1st Marine Logistics Group, I MEF, aboard Marine Corps Air Ground Combat Center Twentynine Palms, Calif. during Exercise STEEL KNIGHT 14, December 13, 2013. STEEL KNIGHT enables participating I MEF units to hone their conventional warfighting capabilities by practicing the skills needed to deploy and fight as part of a Marine Air Ground Task Force. (U. S. Marine Corps photo by CWO3 Benn Barr, 1st Marine Division Combat Camera/Released)