Arvind Kejriwal, 45, became the seventh Chief Minister of Delhi. He and his ministers were sworn in at Ramlila Maidan, a massive public park in the heart of the city. Like Mr Kejriwal, who defeated three-time chief minister Sheila Dikshit in her constituency by 25,000 votes, most of his ministers are political novices who are now being called "giant killers". His one-year-old Aam Aadmi Party (AAP) will be in power in Delhi with external support from the Congress.