"Air War" is a single by Crystal Castles. It was released on 17 December 2007 by Trouble Records as a 7" vinyl. An earlier version of the song was released in July 2006 as the B-Side to "Alice Practice" on Merok Records. The lyrics are from the James Joyce book Ulysses. The cover art gathered public interest because of the odd picture of Ethan Kath and Alice Glass with ice cream cones as heads.