In a time of empty streets and overcrowded hospitals, one of the most enduring images of the last month has been the sight of Italians singing from windows and balconies in a communal display of spirit and resilience. On Friday, April 10, with neighbors cheering from across the fence on one side, and atop a roof on the other, three New Orleans musicians lifted their voices from a backyard in the Bywater neighborhood. It was a heartwarming performance and a vignette of how New Orleans musician...