The lineup has been revealed for this year’s Four Chord Music Fest. The event will take place at F.N.B. Stadium in Pittsburgh, PA on September 25-26 and it will feature the following: September 25: Knocked Loose, Underoath, Kublai Khan TX, We Came As Romans, Saosin, Superheaven, Counterparts, Haywire, Militarie Gun, Thousand Below, Facewreck, and Pain…