John McCain Funeral

The choir sings at a memorial service for Sen. John McCain, at Washington National Cathedral in Washington, Sept. 1, 2018.

Former U.S. president Barack Obama speaks at a memorial service for the late Senator John McCain, at National Cathedral in Washington, Sept. 1, 2018.

Former U.S. president George Bush speaks at the memorial service for Senator John McCain at the National Cathedral in Washington, Sept. 1, 2018.

Former U.S. president Bill Clinton, former secretary of state Hillary Clinton, former vice president Dick Cheney and Lynne Cheney are seen at the memorial service for U.S. Senator John McCain at the National Cathedral in Washington. Sept. 1, 2018.

Meghan McCain speaks at a memorial service for her father Sen. John McCain at National Cathedral in Washington, Sept. 1, 2018.

Family members of Sen. John McCain, are gathered as his casket arrives on the steps of the Washington National Cathedral in Washington, Sept. 1, 2018, for a memorial service.

Cindy McCain, wife of, Sen. John McCain, accompanied by President Donald Trump's Chief of Staff John Kelly (R) Defense Secretary Jim Mattis (L) and family members, arrives at the Vietnam Veterans Memorial in Washington, Sept. 1, 2018.

Cindy McCain, wife of Sen. John McCain, accompanied by President Donald Trump's Chief of Staff John Kelly (L) and Defense Secretary Jim Mattis (2-L) lays a wreath at the Vietnam Veterans Memorial in Washington, Sept. 1, 2018.

A crowd is seen gathered before Cindy McCain, wife of Sen. John McCain, arrives to lay a wreath at the Vietnam Veterans Memorial in Washington, Sept. 1, 2018.

Cindy McCain, the wife of Sen. John McCain, with Defense Secretary Jim Mattis (L) and White House Chief of Staff John Kelly, depart after placing a wreath at the Vietnam Veterans Memorial, Sept. 1, 2018.

U. S. Navy SN Caleb Harrington stands ready to assist Cindy McCain, wife of late Sen. John McCain, Secretary of Defense James Mattis and John Kelly, White House Chief of Staff, lay a wreath at the Vietnam Veterans Memorial in Washington, Sept. 1, 2018.

Onlookers applaud as Cindy McCain, wife of Sen. John McCain, and other family members depart after placing a wreath at the Vietnam Veterans Memorial, Sept. 1, 2018, in Washington.

The casket of Sen. John McCain, R-Ariz., is carried down the steps of the U.S. Capitol in Washington, Sept. 1, 2018, in Washington, for a departure to the Washington National Cathedral for a memorial service.

The casket of Sen. John McCain, R-Ariz., is is placed in the hearse at the U.S. Capitol in Washington, Sept. 1, 2018, in Washington, for a departure to the Washington National Cathedral for a memorial service.