A view of signage leading to one of the testing centers at Heathrow Airport on December 22, 2020 in London, England.Joseph Okpako | Getty Images News | Getty ImagesThe United States will begin requiring people flying in from the U.K. to test negative for Covid-19 no more than 72 hours before departure, the CDC said in a late Thursday statement.The announcement comes after the U.K. earlier this week said it identified a new strain of Covid-19 that appears to spread more quickly. The CDC said President Donald Trump will sign the order on Friday and the measure will go into effect …
