coronavirus June 14, 2021 10:29 pm The Delta Variant: What It Is and Why It's So Concerning The new Delta variant of COVID-19 has postponed the reopening of the U.K. by a month. The TEN looks at how viruses mutate to create new variants and the impact on the coronavirus pandemic. US & World Videos 2:44 Weather forecast: Frigid air eases up 2:24 NH family reunited with cat found in Michigan 2:55 Federal agents conduct operation in East Boston 2:37 Former Capitol Police officer reacts to sweeping Jan. 6 pardons 3:05 Communities brace for new ICE policies under Trump