M1 Abrams Main Battle Tanks with 1st Tank Battalion patrol during the demolition of Combat Outpost Ertoba in Musa Qala district, Helmand province, Afghanistan, July 12, 2013. 3rd CEB demolished COP Ertoba in preparation for the retrograde of coalition forces from Afghanistan. (U.S. Marine Corps photo by Cpl. Trent A. Randolph/Released)