20060829 Chicago,IL. : GRIDIRON GANG star Dwayne ÒThe RockÓ Johnson at Chicago A.S.A.S. Screening of Columbia PicturesÕ feature film Gridiron Gang.ÊÊHe was still sporting a covering on his right foot from a ruptured Achilles tendon that had happened in June. The screening was at AMC River East 21 Theater.(Photo-Linda Matlow/PIXINTL)