Anti-Flag is an American punk rock band straight out of Pittsburgh, Pennsylvania. The band is well known for political activism, focusing on anti-war activism, anti-imperialism, class struggle, human rights, and various sociopolitical sentiments. Anti-Flag is also known also for their advocacy of progressive political action groups such as Greenpeace and Amnesty International. Most recently, the band has declared solidarity with the global Occupy Together movement. The line-up includes Justin Sane (Singer/Guitarist), Pat Thetic (Drummer), who both founded the band and later members include Chris Head (Guitarist),and Chris Barker (Singer/Bassist).