US President Joe Biden fell over after giving a speech thanking US air force academy graduates for choosing "service over self".He said they now have the "great privilege" of leading in a world that will only get more confusing in the years to come, and then stumbled on stage after handing out diplomas to graduates.

US President Joe Biden fell over after giving a speech thanking US air force academy graduates for choosing "service over self".He said they now have the "great privilege" of leading in a world that will only get more confusing in the years to come, and then stumbled on stage after handing out diplomas to graduates.