Joe Biden’s last appearance in public was four days ago when he was seen slowly walking off Air Force One after testing positive for Covid-19. The 81-year-old disembarked the aircraft at Dover Air Force Base in Delaware before getting inside a car on Wednesday (17 July). The president announced his decision to quit the 2024 presidential race on Sunday (21 July). In a post on X, formerly Twitter, Biden said “it was “in the best interest of my party and the country for me to stand down”.