Army Staff Sgt. Joshua Crenshaw, left, an explosive ordnance disposal technician from the 764th Ordnance Company from Fort Carson, Colo., instructs troops from the Cameroonian armed forces on how to dispose of a vest-borne improvised explosive device during Exercise Counter Improvised Explosive Device-Defeat Phase I in Douala, Cameroon, Nov. 15, 2017. The threat of IED contact is relevant to Cameroonian troops, who deploy to the Lake Chad Basin to fight Boko Haram and other terrorist organizations. Army photo by Sgt. 1st Class Alexandra Hays