A U.S. Marine provides security while participating in a ground air integration training event Jan. 26, 2015, during Integrated Training Exercise 2-15 at Marine Corps Air Ground Combat Center Twentynine Palms (MCAGCC), Calif., MCAGCC conducts relevant live-fire combined arms training, urban operations, and Joint/Coalition level integration training that promotes operational forces readiness. (U.S. Air Force photo by Airman 1st Class Matthew L. Garcia/Released)