John S. McCain III is escorted by Lt. Cmdr. Jay Coupe Jr., public relations officer, March 14, 1973, to Hanoi's Gia Lam Airport after the POW was released. (AP Photo/Horst Faas)
**ADVANCE FOR SUNDAY, JUNE 8--FILE** In this Feb. 18, 1985 file photo, U.S. Rep. John McCain III, R-Ariz., holds a photo of a marker in Hanoi at Truc Bach Lake where he parachuted after being shot down as a Navy pilot in the Vietnam War, in Bankok, Thailand, en route to Hanoi to visit this site. (AP Photo/Jim Bourdier, file)
U.S. Navy Commander John S. McCain 3rd, a guest of the South Vietnamese government, visits the Holt orphanage in Saigon, Vietnam, on Oct. 30, 1974. The institution cares for many youngsters fathered by American G.I.s. McCain, son of the admiral who commanded U.S. forces in the Pacific at the height of the Vietnam War, was shot down over Hanoi and spent several years as a POW. (AP Photo/Dang Van Phuoc)
FILE - In this July 14, 1961, file photo, then Lt. John S. McCain III, left, and his parents, Rear Adm. John S. McCain Jr. and Roberta Wright McCain take part in the ceremony to commission McCain Field, the U.S. Navy training base in Meridian, Miss., named in honor of Adm. John S. McCain, in photo at top, respectively grandfather and father to the two McCains. Ten U.S. sailors are missing after a collision between the USS John S. McCain and a tanker early Monday, Aug. 21, 2017, east of Singapore, the second accident involving a ship from the Navy's 7th Fleet in the Pacific in two months. The 154-meter (505-foot) McCain is named after U.S. Sen. John McCain's father and grandfather, who were both U.S. admirals. (AP Photo/File)
** FILE ** In this June 24, 1992 file photo, Sen. John McCain, R-Ariz., holds up an article from the Washington Times on Capitol Hill during a hearing of the Senate Select Committee on POW/MIA Affairs. In 1990s, McCain shouldered the wrenching issue, the long effort to account for American soldiers still missing from the war and to normalize relations with Vietnam. (AP Photo/John Duricka, File)
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