When a stacked spectrum of colors stretched across the sky above parts of central and western Pennsylvania in early July 2021, Joe Murgo missed it. He was in Italy with his family. Perhaps that was fitting. The sight, visible across at least four counties spanning 40 or 50 miles, looked a little like a rainbow cookie from an Italian-American pastry shop—red, yellow, green, a riff on the colors of the Italian flag. It was a familiar kind of sight, but appeared on a sunny day with wispy clouds. Many onlookers…