Sandra Gessner, 26, of Lewiston, has filed suit against rapper Marky Mark and th

Sandra Gessner, 26, of Lewiston, has filed suit against rapper Marky Mark and the city of Portland for injuries received during a concert at the Portland Expo in January 1992 -- Gessner claims concert promoters failed to provide adequate security and Expo officials violated federal disability laws, and is seeking unspecified damages for injuries received when concert-goers rushed the stage -- Detail