Joe Biden calls for unity on 20th anniversary of 9/11

President Joe Biden is making an appeal for the US to reclaim the spirit of co-operation that sprung up in the days following the 9/11 terror attacks as he commemorates those who died 20 years ago (Evan Vucci/AP)

President Joe Biden is making an appeal for the US to reclaim the spirit of co-operation that sprung up in the days following the 9/11 terror attacks as he commemorates those who died 20 years ago.

Mr Biden, who is marking his first anniversary of tragic day as commander in chief, was a senator when hijackers comandeered four planes and carried the nation’s worst terror attack in 2001.