In this Dec. 10, 2015 photo, workers make preparations to dispose of M6 artillery propellant stored in bunkers at Camp Minden, in Minden, La. Three of the men who pleaded guilty in connection with what a prosecutor called the nation’s worst dumping of explosives still owe substantial restitution — one for nearly all of the $34.8 million he was ordered to pay, federal prosecutors say. The two others have paid all they were assessed. (Henrietta Wildsmith/The Shreveport Times via AP)