A beat later came the second wave. As the camels sprinted toward their first turn at Al-Wathba racetrack, a fleet of sport utility vehicles, five or six wide, shifted into gear and zoomed after them, tailing the animals on the paved roads that flanked both sides of the soft dirt track. To the uninitiated, it looked like a presidential motorcade locked in a low-speed chase with a pack of Bedouins. To the more familiar, it was simply camel racing, modernized.