DIEGO GARCIA, British Indian Ocean Territory (Jan. 28, 2021) Master-at-Arms 1st Class Joshua Dewalls, the small arms marksmanship instructor, and Gunner�s Mate 1st Class David Perrin, the range safety officer, calculate scores during a small arms live fire qualification course onboard U.S. Navy Support Facility (NSF) Diego Garcia, Jan. 28, 2021. Dewalls and Perrin 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)