Spinefarm Records has signed two new acts to its worldwide roster - Pittsburgh's incendiary punk rock iconoclasts Anti-Flag for their tenth full-length album, and Aussie hard rock band Airbourne for their fourth album.

Anti-Flag (pictured) are well known for their political activism and work with and support organisations such as Amnesty International, ACLU, Greenpeace, Planned Parenthood, Rainforest Action Network, PETA and more.

Airbourne have scored various No.1 Rock Chart entries, as well as awards for Best Album and ...