 MUMBAI Reuters - India has blocked the airing of a BBC documentary which questioned Prime Minister Narendra Modis leadership during the 2002 Gujarat riots, saying that even sharing of any clips via social media is barred. Directions to block the clips from being shared have been issued using emergency powers available to the government under the countrys information technology rules, said Kanchan Gupta, an adviser to the government, on his Twitter handle on Saturday. While the BBC has not ai... 