New Delhi, Feb. 21 -- Rekha Gupta, a first-time lawmaker, was sworn in as the Delhi chief minister on Thursday at Ramlila Maidan at a ceremony attended by Prime Minister Narendra Modi, Union home minister Amit Shah among other top National Democratic Alliance (NDA) leaders, 12 days after the Bharatiya Janata Party (BJP) was voted back to power in the national capital after 27 years....