UPPER MARLBORO, MD — August 30, 2018 — Six Flags America, DC’s Thrill Capital, today announced FIREBIRD, the only floorless roller coaster in Maryland, will open in spring 2019. This all-new coaster experience will take thrill-seekers through incredible twists, drops and inversions, all while seated in state-of-the-art floorless trains. “Six Flags is always taking thrilling […]