Lewis Hamilton raced to a triple Formula One world championship title after a thrilling US Grand Prix on a rainy Sunday night. Hamilton beat German team mate Nico Rosberg by 2.8 seconds to become the first British driver to win back-to-back titles. "That's the greatest moment of my life," he said as he choked back tears to celebrate the win, equalling idol Ayrton Senna. The 30-year-old driver had to beat Ferrari's Sebastian Vettel, who finished third, by nine points and Rosberg by two to seize the win. He won the title with three races to spare.