US COVID-19 cases surpass 4 mln: Johns Hopkins University Virus surge linked to rise in joblessness in US COVID-19 crisis making it worse for 40 mln children missing pre-school: UNICEF NASA's Mars Perseverance rover passes flight readiness review US House votes to repeal Trump administration's travel bans US virus briefing turns political Envoy: Wise options open to Canada for mutual ties California orders more masks as state has most COVID-19 cases in US Millions face end to key jobless benefit Education Cannot Wait announces new funds in COVID-19 response for children US COVID-19 cases much greater than official count: study Backlash growing over diverted federal agents Allegations made against WHO called unacceptable Trump announces 'surge' of federal agents to Chicago US House votes to remove Confederate statues from Capitol WHO says US, Brazil and India can 'deal with' pandemic WHO chief says questioning of his independence 'unacceptable' Trump cancels Republican convention in Florida White House executive offices close cafeterias after employee tests positive