On June 19, 2021, Opera Saratoga will present “America Sings: A Juneteenth Celebration.” Streamed from Caffe Lena, the free concert will celebrate the end of slavery in the United States. Curated by distinguished alumnus and bass-baritone Carl DuPont. The concert will include music from composers such as H. Leslie Adams, Tim Amukele, Margaret Bonds, Uzee Brown, Moses Hogan, Betty Jackson {…}