Healthcare workers from UPMC Mercy hospital watch as the Pennsylvania Air National Guard performs a flyover to salute Pennsylvania’s frontline COVID-19 responders, Tuesday, May 19, 2020, in Uptown. The 171st Air Refueling Wing and 193rd Special Operations Wing had a KC-135 Stratotanker and an EC-130J Super J aircraft flyover across the Pittsburgh, Johnstown and Harrisburg areas as a nationwide salute to all those supporting pandemic response efforts. (Michael M. Santiago/Post-Gazette)