Biden trips and falls during graduation ceremony

President Joe Biden tripped and fell after handing out the last diploma at a graduation ceremony at the US Air Force Academy in Colorado on Thursday.

The 80-year-old US president fell forward, caught himself with his hands, then got up on one knee while helped by three people. He then walked back to his seat unassisted.

After Biden was helped up, he pointed behind him, seeming to indicate that he had tripped over a sandbag used to hold the teleprompter in place. He mingled with other officials afterwards, smiling and giving a "thumbs up" sign.

Upon returning to the White House, Biden joked to reporters, “I got sandbagged."

The fall came after a commencement address Biden delivered to a flag-waving audience, warning graduates they will enter service in an increasingly unstable world, citing challenges from Russia and China.

Biden, the oldest person to hold the Oval Office, is running for re-election in 2024. His leading Republican opponent, Donald Trump, turns 77 this month.

Trump, asked about Biden's fall during an Iowa rally, said, "He actually fell down? Well I hope he wasn’t hurt."

Trump added, "You gotta be careful about that," even if you have to "tip-toe down a ramp."

In June 2020, Trump's slow, careful descent of a ramp at the U.S. Military Academy at West Point had some observers questioning his agility. "The last thing I was going to do is ‘fall’ for the Fake News to have fun with," Trump had tweeted afterward.