Foreign Doctors Could Help Fight Coronavirus. But U.S. Blocks Many.

LOS ANGELES -- Visa and airline ticket in hand, a Filipina nurse named Maria checked in recently for her flight from London to the United States, where a job awaited her as an intensive care nurse at a North Carolina hospital on the front lines of the coronavirus crisis.But under the travel restrictions imposed by President Donald Trump to help prevent new exposure to the virus, she was not allowed to board."I was told that my visa is valid and I would be allowed to travel once the restrictions