President Joe Biden tumbled on stage Thursday after delivering remarks at the US Air Force Academy commencement, but the White House said he was not hurt. Biden, 80, tripped and fell to the ground after handing a diploma to the last of roughly 900 cadets to cross the stage. After going down, Biden appeared to point to a nearby sandbag for anchoring on the riser, indicating that he tripped on it. White House communications director Ben LaBolt later said Biden stumbled over the sandbag.  -------- Follow Bloomberg for business news & analysis, up-to-the-minute market data, features, profiles and more: http://www.bloomberg.com/ Connect with us on... Twitter: https://twitter.com/business Facebook: https://www.facebook.com/bloombergbusiness Instagram: https://www.instagram.com/bloombergbusiness/