John McCain as a young child in an undated family snapshot from the late 1930s. AFP Photo
Senator John McCain looks on during a press conference about his resistance to the so-called 'Skinny Repeal' of the Affordable Care Act on Capitol Hill in Washington, USA, on July 27, 2017. Reuters
Sheikh Mohammed bin Zayed, Crown Prince of Abu Dhabi and Deputy Supreme Commander of the UAE Armed Forces, meets with John McCain at Al Shati Palace, on February 21, 2017. Rashed Al Mansoori / Crown Prince Court - Abu Dhabi
John McCain smiles to the crowd before he is awarded the 2017 Liberty Medal in Philadelphia, Pennsylvania, on October 16, 2017. Reuters
Sheikh Mohammed bin Zayed meets with John McCain at Al Shati Palace on July 1, 2017. Rashed Al Mansoori / Crown Prince Court - Abu Dhabi
Republican presidential candidate John McCain, standing with his wife Cindy, encourages his supporters to stand up and fight for America during a campaign rally in Bensalem, Pennsylvania., on October 21, 2008. AP Photo
US President Bill Clinton talks to Senator John McCain after announcing that the US is establishing normal relations with communist Vietnam at the White House in Washington, DC, on July, 11, 1995. AFP
King Abdullah II of Jordan, right, and his wife Queen Rania talk to then US presidential hopeful John McCain at the Royal Palace on March 18, 2008 in Amman, Jordan. Jordanian Royal Court via Getty Images
Then Republican presidential candidate John McCain speaks during a rally in Henderson, Nevada on November 3, 2008. AP Photo
John McCain gestures towards Texas Governor George W Bush, left, as conservative activist Gary Bauer looks on during the Republican candidates debate at the University of New Hampshire in Durham, NH, on January 6, 2000. Getty Images
John McCain talks with people on a crowded street during the filming of a CBS Reports Special entitled 'Honor, Duty and a War Called Vietnam,' in Hanoi, Vietnam, on March 6, 1985. Getty Images
US Navy Lt. Cmdr. Jay Coupe, left, escorts Lt Cmdr John McCain to a waiting US Air Force C-141A Starlifter Cargo Transport Aircraft at Gia Lam Airport after he was released from a prison camp in Hanoi, North Vietnam, on March 14, 1973. Getty Images
John McCain is pulled out of Hanoi Lake by North Vietnamese Army soldiers and civilians after his A-4E Skyhawk was shot down in Hanoi, North Vietnam, on October 26, 1967. Getty Images
American soldier and Vietnam prisoner of war (and future US Senator) John McCain as he sits on a sofa during an interview on April 24, 1973. Getty Images
John McCain, right, is seen with his father John S McCain, Jr and brother Joe, left, in an undated family snapshot from the 1940s. AFP Photo
John McCain as a young child in an undated family snapshot from the late 1930s. AFP Photo
Senator John McCain looks on during a press conference about his resistance to the so-called 'Skinny Repeal' of the Affordable Care Act on Capitol Hill in Washington, USA, on July 27, 2017. Reuters
Sheikh Mohammed bin Zayed, Crown Prince of Abu Dhabi and Deputy Supreme Commander of the UAE Armed Forces, meets with John McCain at Al Shati Palace, on February 21, 2017. Rashed Al Mansoori / Crown Prince Court - Abu Dhabi
John McCain smiles to the crowd before he is awarded the 2017 Liberty Medal in Philadelphia, Pennsylvania, on October 16, 2017. Reuters
Sheikh Mohammed bin Zayed meets with John McCain at Al Shati Palace on July 1, 2017. Rashed Al Mansoori / Crown Prince Court - Abu Dhabi
Republican presidential candidate John McCain, standing with his wife Cindy, encourages his supporters to stand up and fight for America during a campaign rally in Bensalem, Pennsylvania., on October 21, 2008. AP Photo
US President Bill Clinton talks to Senator John McCain after announcing that the US is establishing normal relations with communist Vietnam at the White House in Washington, DC, on July, 11, 1995. AFP
King Abdullah II of Jordan, right, and his wife Queen Rania talk to then US presidential hopeful John McCain at the Royal Palace on March 18, 2008 in Amman, Jordan. Jordanian Royal Court via Getty Images
Then Republican presidential candidate John McCain speaks during a rally in Henderson, Nevada on November 3, 2008. AP Photo
John McCain gestures towards Texas Governor George W Bush, left, as conservative activist Gary Bauer looks on during the Republican candidates debate at the University of New Hampshire in Durham, NH, on January 6, 2000. Getty Images
John McCain talks with people on a crowded street during the filming of a CBS Reports Special entitled 'Honor, Duty and a War Called Vietnam,' in Hanoi, Vietnam, on March 6, 1985. Getty Images
US Navy Lt. Cmdr. Jay Coupe, left, escorts Lt Cmdr John McCain to a waiting US Air Force C-141A Starlifter Cargo Transport Aircraft at Gia Lam Airport after he was released from a prison camp in Hanoi, North Vietnam, on March 14, 1973. Getty Images
John McCain is pulled out of Hanoi Lake by North Vietnamese Army soldiers and civilians after his A-4E Skyhawk was shot down in Hanoi, North Vietnam, on October 26, 1967. Getty Images
American soldier and Vietnam prisoner of war (and future US Senator) John McCain as he sits on a sofa during an interview on April 24, 1973. Getty Images
John McCain, right, is seen with his father John S McCain, Jr and brother Joe, left, in an undated family snapshot from the 1940s. AFP Photo
John McCain as a young child in an undated family snapshot from the late 1930s. AFP Photo