Glen Matlock of the Sex Pistols is appearing at the Rock and Roll Hall Of Fame soon as part of their Legends Series. The "evening of performance and conversation" takes place on the Museum's Main Stage on May 20th. The Fat Wreck Chords news letter said that Anti-Flag were asked to perform "Pretty Vacant" along with Glen at the event (the newsletter said "for his induction," but he's not being inducted). There's no word in the press release on the Anti-Flag appearance.