Peter Mulvey's 'Take Down Your Flag' responds to Charleston shooting

After the killings of nine black church members by a white gunman in Charleston, S.C., folk singer-songwriter Peter Mulvey tried to make sense of the massacre by talking about the event with other musicians. Two days after the shooting at Emanuel African Methodist Episcopal Church, Mulvey penned a simple, three-chord tribute, "Take Down Your Flag," and performed it that night, opening for folk rocker Ani DiFranco in Northampton, Mass.