151123-N-TI693-011 NAVAL SUPPORT ACTIVITY PANAMA CITY Fla. (Nov. 23, 2015) Cmdr. Hung Cao, commanding officer of the Naval Diving and Salvage Training Center (NDSTC) welcomes Sen. Bill Nelson (D, Fla.) aboard the Quarterdeck of NDSTC where he explains the history of the various dive suits on display. Sen. Nelson and Rep. Gwen Graham (D, Fla.-2) visited NDSTC for a informative tour of their facilities to gain a better understanding of the training and technology used to become a military diver. (U.S. Navy photo by Mass Communication Specialist 2nd Class Fred Gray IV/Released)