Sergeant Casimiro Zarate, a Bunkerville, Nev., native serving with 1st Reconnaissance Battalion, leads a seven-man rifle detail in a salute during the playing of “Taps” at the Richard Nixon Presidential Library and Museum for the Vietnam Prisoner of War 40th Annual Homecoming Reunion here, May 23, 2013. Nearly 200 former Vietnam POWs and their families gathered at the Nixon Presidential Library on the 40th anniversary of when President Nixon hosted the service members for the largest dinner ever held at the White House, May 24, 1973, on the South Lawn.