Formula One championship leader Jenson Button put himself on pole position for a fifth win in six races after a manic Monaco Grand Prix qualifying session on Saturday. Kimi Raikkonen, the 2007 world champion whose Ferrari team are threatening to walk away at the end of the season in a standoff over the 2010 rules, joined the Briton on the front row in a sign of the Italian team's resurgence after a dismal start to the year.