Anti-Flag is an American punk rock band from Pittsburgh, Pennsylvania, United States. The band is well known for its left-wing political activism. The line-up includes singer/guitarist Justin Sane and drummer Pat Thetic, who founded the band together; later members are guitarist Chris Head, and singer/bassist Chris Barker (#2) who replaced Jamie “Cock” Towns, who had replaced original bassist Andy Flag in 1997 following his departure one year prior. Anti-Flag is known also for their advocacy of progressive political action groups such as Greenpeace and Amnesty International. Most recently,[when ] the band has declared solidarity with the global Occupy Together movement.