170527-N-OY339-533 SIGONELLA, Sicily (May 27, 2017) President Donald J. Trump signs the Albo d’Onore, the Sigonella Italian Air Force base guest book, onboard Naval Air Station Sigonella after an all-hands call. This visit marks President Trump’s last stop of his first trip abroad since taking office. (U.S. Navy photo by Mass Communication Specialist 2nd Class Christopher Gordon/Released)