For the first time since the beginning of the pandemic, Amazon, Microsoft, Apple and Alphabet are each worth more than a trillion dollars according to their market capitalizations. While the virus continues to ravage the U.S. economy generally, the tech sector has remained a relative bright spot for now. Jessica Lessin of The Information explains. Also, many experts say there is a lack of adequate coronavirus testing measures in the U.S. NPR’s Rob Stein has the latest on problems with testing.