BEST OF THE MARINE CORPS - May 2006 - Defense Visual Information Center by expertinfantry on Flickr.

Via Flickr:
US Marine Corps (USMC) Marines with 81mm Mortar Platoon, 2nd Battalion (BN), 4th Marine Regiment (MAR REGT), attached to the 31st Marine Expeditionary Unit (MEU), fire an 81mm M252 mortar tube during a live fire training exercise