Pfc. Michael Ainsworth, a mortarman with Weapons Company, 3rd Battalion, 5th Marine Regiment adjusts the sights of the 81 mm mortar system during a combined-arms raid at Army National Training Center Fort Irwin, California April 11, 2015. The raid was conducted by 1st Light Armored Reconnaissance Battalion as part of exercise Desert Scimitar 2015. - Pfc. Michael Ainsworth, a mortarman with Weapons Company, 3rd Battalion, 5th Marine Regiment adjusts the sights of the 81 mm mortar system during a combined-arms raid at Army National Training Center Fort Irwin, California April 11, 2015. The raid was conducted by 1st Light Armored Reconnaissance Battalion as part of exercise Desert Scimitar 2015.