The door of a helicopter fell on a house at Begunteuri village in Manikganj's Singir upazila today. No people were killed or injured as the house was empty at the time. The training helicopter of the Bangladesh Air Force was flying overhead, when the door suddenly detached and fell on the house of Engineer Abdur Razzak at around 12:30pm, said Abdus Sattar, officer-in-charge of