MUMBAI, Jan. 11 -- A British national of Indian origin and a vocal critic of the BJP-led government on social media, London-based Dr Sangram Patil, and his wife were detained on arrival at 2 am on Saturday at the Chhatrapati Shivaji Maharaj International Airport for over 15 hours. Police said an FIR was registered against him at the N M Joshi Marg police station on December 18, after Dr Patil, who has a strong following on social media, had allegedly posted defamatory material against Prime Minister Narendra Modi. The FIR was based on a complaint lodged by Nikhil Bhamre, social media coordinator of the BJP's state unit. P3...