US Vice President Dick Cheney (L) takes the oath of office during the inaugural ceremony for Cheney and President George W. Bush 20 January 2001 at the US Capitol in Washington, DC. AFP PHOTO/LUKE FRAZZA (Photo credit should read LUKE FRAZZA/AFP via Getty Images)
Portrait of Richard 'Dick' Cheney, Assistant to President Ford, ca 1975. (Photo by PhotoQuest/Getty Images)
Vice Prsident Dick Cheney (R) and US President George W. Bush watch as Robert Gates delivers remarks during his ceremonial swearing in as the 22nd defense secretary at the Pentagon 18 December 2006 in Washington, DC. Gates is replacing Donald Rumsfeld who resigned a day after a Republican thrashing in mid-term elections that were seen as a referendum on the war in Iraq. (Photo credit should read MANDEL NGAN/AFP/Getty Images)
WASHINGTON - SEPTEMBER 11: (L-R) U.S. President George W. Bush, first lady Laura Bush, Vice President Dick Cheney and Cheney's wife Lynne participate in a moment of silence to mark the seventh anniversary of the 9/11 terrorist attacks at the South Lawn of the White House September 11, 2008 in Washington, DC. Bush will speak at a ceremony to dedicate the Pentagon Memorial to the memory of those killed on September 11, 2001 at the Pentagon. (Photo by Alex Wong/Getty Images)
LAKEWOOD, CO - DECEMBER 7: Former Vice President Dick Cheney responds to questions about Saudi Arabia and the US' history with them at The Event Center at Colorado Christian on December 7, 2015 in Lakewood, Colorado. Former Vice President Cheney, under President George W. Bush, spoke on the campus about his time in office, the current administration's take on foreign policy and what the future might look like when it comes to national security and politics. Cheney's appearance is part of CCU's Distinguished Speaker Series which previously hosted presidential candidate Ben Carson. (Photo by Brent Lewis/The Denver Post via Getty Images)
