Samuel Brown, a musician and writer, interviews the squad leader of the West Powelton Steppers and Drummers, who tells him that the drum team kept him alive and out of jail when he was young, and now he’s paying it forward, helping kids today focus on performing music and precision steps, rather than hanging on street corners and getting into trouble. Drum squads are a big part of Philadelphia’s recent history and culture, and Antoine Mapp tells you why they matter.