A preliminary report points to a significant mechanical problem before a deadly police helicopter crash that happened during a shootout in Flagstaff, Arizona.

A midair collision involving two helicopters in Hammonton, New Jersey, killed one person and critically injured another, federal authorities say. How did two small helicopters crash into each other ...

It was good news, albeit good news of the your-house-hasn’t-burned-down variety. Last week, the Ministry of Defence (MoD) announced ...