160225-N-VN372-183 HOUSTON (Feb. 25, 2016) Senior Chief Sonar Technician Paul R. McCrory, chief of the boat aboard the Los Angeles-class attack submarine USS Houston (SSN 713), presents former first lady Barbara Bush with a photo of the boat and crew during an official visit Feb 25, 2016. Sailors from USS Houston visited several schools, participated in community relations activities and met with dignitaries from around Houston during a week-long visit to the ship’s namesake city. (U.S. Navy photo by Mass Communication Specialist 1st Class Chris Fahey/Released)