DIEGO GARCIA, British Indian Ocean Territory (Jan. 28, 2021) � Master-at-Arms 1st Class Joshua Dewalls, the small arms marksmanship instructor, instructs Master-at-Arms 3rd Class Joel Robison, a coxswain, during a small arms live fire qualification course onboard U.S. Navy Support Facility Diego Garcia Jan. 28, 2021. Dewalls and Robison are assigned to NSF Diego Garcia�s security department. NSF Diego Garcia provides logistic, service, recreational and administrative support to U.S. and allied forces forward deployed to the Indian Ocean and Arabian Gulf. (U.S. Navy photo by Mass Communication Specialist Seaman Mariterese Merrique/released).