US President Joe Biden speaks about lives lost to Covid after death toll passed 500,000, in the Cross Hall of the White House in Washington, DC, February 22, 2 - President Joe Biden called the milestone of more than 500,000 US deaths from Covid-19 "heartbreaking" on Monday and urged the country to unite against the pandemic. "I know what it's like," an emotional Biden said in a national television address, referring to his own long history of family tragedies. (Photo by SAUL LOEB / AFP)