190612-N-AN383-1037 SIGONELLA, Sicily (June 12, 2019) Master-at-Arms 2nd Class John Villielm responds to a simulated security emergency during an installation security assessment onboard Naval Air Station (NAS) Sigonella June 4. NAS Sigonella’s strategic location enables U.S, allied, and partner nation forces to deploy and respond as required to ensure security and stability in Europe, Africa and Southwest Asia. U.S. Navy photo by U.S. Gunner’s Mate Seaman Rashond Grant (Released)