150923-N-ZZ999-103 LISBON, Portugal (Sept. 23, 2015) Adm. Mark Ferguson, center, commander of Allied Joint Force Command Naples and U.S. Naval Forces Europe-Africa, tours the Portuguese navy submarine NRP Tridente (S 160) with Portuguese navy leadership in Lisbon, Portugal. U.S. Naval Forces Europe-Africa, headquartered in Naples, Italy, oversees joint and naval operations, often in concert with allied, joint, and interagency partners, in order to advance U.S. national interests, security and stability in Europe and Africa. (U.S. Navy photo/Released)