Foo Fighters debuted their new song ‘Waiting On A War’ on Jimmy Kimmel Live! in the US last night (January 14) – you can watch their performance below.The track was released yesterday as the latest preview of the Dave Grohl-fronted band’s upcoming new album ‘Medicine At Midnight’, which is set for release on February 5.The Foos gave their first live performance of ‘Waiting On A War’ last night while serving as the musical guests on the latest episode of the US chat show Jimmy Kimmel Live!.You