Former U.S. president George H.W. Bush's service dog, Sully, paid tribute to his master resting on the floor next to 41st president's flag-draped casket.
The 41st president of the United States passed away on Friday at the age of 94.
Former Secretary of State Colin Powell called him "a flawless American" for how "he served the country in so many capacities".
President Donald Trump has sent a presidential airplane to Texas to fly Bush's body to Washington.
In this February 11, 1991, file photo, President George H.W. Bush talks to reporters in the Rose Garden of the White House after meeting with top military advisors to discuss the Persian Gulf War.
He added: "A handsome day In Texas - 'ceiling and visibility unlimited, ' Mr. President".
Americans will begin saying goodbye to Mr Bush on Monday when his body arrives in Washington for public viewing in the Capitol Rotunda.
The church will also hold a second memorial service for the former president at 11 a.m. ET Thursday. Trump and the first lady, Melania Trump, are scheduled to attend. The House is also expected to approve by unanimous consent a two-week extension to government funding, which would run out on Friday; that would avert, for now, a partial government shutdown that was looming. Former Canadian prime minister Brian Mulroney told Politico he will deliver one of several eulogies at the service, at Bush's request.
The heartwarming image of Sully by the casket was tweeted by Jim McGrath, former President Bush's spokesman, on Sunday night.
The image shows the former President's service dog lying next to his coffin during a service in Houston. Cheney was the elder Bush's defence chief and the most influential of the people who served the 41st president to work for the 43rd.
President Bush had been receiving treatment for a form of Parkinson's disease and had been admitted to hospital with a blood infection in April.
That was a time that saw the end of the Cold War as well as the United States' routing of Iraqi President Saddam Hussein's army in the 1991 Gulf War. After each time "he would bounce back", Baker said on ABC.
"Little did I know or did he know, of course, that by 10 o'clock that night he'd be in heaven", Baker said.
Bush replied: "Good, that's where I want to go".
George H.W. Bush and the four living ex-presidents gather in the White House shortly after Barack Obama's election.