An Air India passenger plane bound for London with more than 240 people on board crashed Thursday in India’s northwestern city of Ahmedabad, and there were no known survivors, officials said. Black smoke billowed from the site where the plane went down in a populated area near the airport in Ahmedabad, a city of more than 5 million and the capital of Gujarat, Prime Minister Narendra Modi’s home state. Firefighters doused the smoking wreckage of the plane, which would have been fully loaded with