Two airmen at a Wyoming U.S. Air Force base have pleaded guilty to making false statements about the deadly shooting of a third that prompted the suspension of Sig Sauer M18 pistol use at nuclear weapons sites for a month, the Air Force said in a statement Friday. The gun pause by the Air Force Global Strike Command after the death of Brayden Lovan, 21, in late July was lifted in late August after Air Force officials determined the M18 was safe to carry.