Just before graduating in 1974, Mary Edwards started what she thought would be a short-lived summer job at St. Louis Public Radio. She never left.

Just before graduating in 1974, Mary Edwards started what she thought would be a short-lived summer job at St. Louis Public Radio. She never left.
Just before graduating in 1974, Mary Edwards started what she thought would be a short-lived summer job at St. Louis Public Radio. She never left.
Just before graduating in 1974, Mary Edwards started what she thought would be a short-lived summer job at St. Louis Public Radio. She never left.
Social media manager Valerie Furlong captured video from the two-day event created to immerse area high school students in the joy of singing a cappella music.