U.S. Navy Petty Officer 2nd Class Duncan Keller, a builder assigned to Naval Mobile Construction Battalion 3, uses a nail gun to secure a 2-by-4 to a support column while working on the Hamramba Primary School in Moroni on the East African island nation of Comoros, Nov. 20. Seabees from NMCB 3 are currently deployed to Combined Joint Task Force-Horn of Africa from their homeport in Port Hueneme, Calif., and have been working on the school in cooperation with the government of Comoros.