Sgt. Brendan Campbell, on-the-job trainee, Explosive Ordnance Disposal, places trinitrotoluene around an M107 155mm High Explosive projectile while excavating at Rainbow Canyon Training Area, Oct. 8, 2015. EOD used TNT, C-4 plastic explosives, and an M107 projectile in an attempt to level the ground for the installation of two 2,500 gallon wildlife guzzlers. (Official Marine Corps photo by Lance Cpl. Thomas Mudd/Released) - Sgt. Brendan Campbell, on-the-job trainee, Explosive Ordnance Disposal, places trinitrotoluene around an M107 155mm High Explosive projectile while excavating at Rainbow Canyon Training Area, Oct. 8, 2015. EOD used TNT, C-4 plastic explosives, and an M107 projectile in an attempt to level the ground for the installation of two 2,500 gallon wildlife guzzlers. (Official Marine Corps photo by Lance Cpl. Thomas Mudd/Released)