Summary Sebastian Vettel clinched his third straight Formula One championship title Sunday.
He finished sixth in an incident-filled Brazilian Grand Prix won by Jenson Button.
Vettel did what he needed to hold off Ferrari s Fernando Alonso, the only other driver contending for the title, and became the youngest three-time champion in Formula One at age 25.
Alonso had a superb start on a hectic first lap at Interlagos and finished second, but that wasn t enough to erase Vettel s lead in the standings.
Lewis Hamilton was leading in his final race with McLaren when Nico Hulkenberg crashed into him while trying to make a pass on a slippery track with 17 laps to go.
Michael Schumacher, F1 s most successful driver, finished seventh in his final race after 19 seasons.
The race finished behind the safety car after Paul Di Resta crashed.
