Singer Chris Cornell, former frontman of the ’90s Seattle grunge band Soundgarden, confirmed via Twitter that the band is getting back together. “The 12 year break is over & school is back in session,” Cornell tweeted. “Sign up now. Knights of the Soundtable ride again!” Cornell provided a link to a new web site, Soundgarden World, which enables fans to sign up for further updates on the band’s reunion. Soundgarden split up in 1997 and Cornell went on to release three solo albums, but in recent years he and other former band mates had hinted at the possibility of an eventual reunion.