US President Joe Biden says he will make a special address to the nation later on Sunday in the wake of the assassination attempt on former US president Donald Trump. “We must unite as one nation to demonstrate who we are,” Biden said in brief remarks at the White House, announcing a formal Oval Office address, a format typically reserved for moments of crisis and major turning points in the country. Biden once again strongly condemned the shooting of former president and presumptive Republican presidential nominee Trump, who was shot in the ear at a campaign rally in Pennsylvania on Saturday….