2010 Formula One World Championship needed to finish fourth to claim the title. McLaren's Jenson Button took the lead of the race when Sebastian Vettel pitted, the 2009 World Champion attempting to extend his lead enough to avoid a costly encounter with Robert Kubica after Lewis Hamilton got caught behind the Renault driver; passing Kubica would give him a chance to catch Vettel, who would resume the lead when Button pitted. Button needed a lead of twenty-two seconds to rejoin the circuit ahead of Kubica and Hamilton, but Kubica was able to match him on lap times and McLaren were forced to pit Button, who
David Walker (racing driver) David Walker (racing driver) David Walker (born 10 June 1941 in Sydney) is an Australian former racing driver who drove for Lotus in the 1971 and 1972 Formula One World Championships. Walker had some international racing experience early in his career in the Australian rounds of the Tasman series in 1964-65 on challenging tracks like Longford and Sandown at a time when most Australian National 2.5 drives were near world class and he also drove a Lotus 70 in the 1971 Australian rounds. During the 1960s Walker's racing career faltered (he was the 1969 British Formula Ford Champion and finished