Four former US presidents are among the ca. 1500 sailors gathered in a Houston church for the funeral of former first lady Barbara Bush, the matriarch of one of the country's most prominent political dynasties.
She died 92 years old on Tuesday.
Bush, the wife of 41th President of US George HW Bush and the mother of 43rd George W. Bush will be remembered on an invitation-only service in St. Martin's Episcopal Church, where she and her family have been members since the 1950s.
Among those who plan to attend are former President Barack Obama and Bill Clinton, current first lady Melania Trump, former Secretary of State Hillary Clinton and former first lady Michelle Obama.
High-ranking officials from the oldest Bush administration, including former vice president Dan Quayle and Dick Cheney, who served as defense secretary before later deputy president of George W. Bush, will also be among the mourners.
President Do nald Trump, who collided with the Bush family during his 2016 campaign, is not expected in Houston. The White House said this week that he wanted to avoid interrupting the service with extra security.
In a Twitter post, Trump said that his "thoughts and prayers are with the entire Bush family".
At Bush's own request, younger son, former Florida governor and 2016 presidential candidate Jeb Bush will deliver a praise. Her long-lasting friend Susan Baker, wife of former state secretary James Baker and the historian and author Jon Meacham, who wrote a biography of George HW Bush, will also make comments on the television service.
Hours before the service is scheduled Start at 11.00 local time on Saturday the security was tight, with bomb-blowing dogs who checked media equipment and police officers who searched for bags.
Guests arrived at another church several miles away to stay the bus to the room and passed a multitude of media.
After Saturday's service, Bush is buried because of the George HW Bush Library and Museum at Texas A & M University at College Station next to her daughter Robin, who died of leukemia at the age of three. The motorcade, which carries its body, will cross both George Bush Drive and Barbara Bush Drive on their way to the grave.