Biden stumbles during Air Force Academy graduation speech.

President Joe Biden stumbled and fell over a sandbag while handing out diplomas at a graduation ceremony for the US Air Force Academy in Colorado. The White House officials confirmed that he is "fine" after the fall. The incident has raised concerns about his age, as he is the oldest serving president at 80. Republican contenders, including former President Donald Trump and Florida Governor Ron DeSantis, reacted to the incident. Biden's last physical examination took place in February, and his physician confirmed that he remains fit for duty.