The Amazing Race is back! On Sept. 30, 11 teams will start a journey around the world with hopes of clenching the CBS show's largest prize ever: $2 million. So, who will be racing? Season 21's teams include twin sisters from Sri Lanka; a pair of musically-inclined Chippendales dancers; and married Monster Truck racers. There's also a heavy metal rocker from the band Megadeath; goat farmers (and stars of The Fabulous Beekman Boys, Josh Kilmer-Purcell and Brent Ridge); a competitive lumberjack and a double amputee. "At 19, my life took a detour when I got bacterial meningitis and lost both my legs below the knees,...