资讯

The NTSB concluded three days of investigative hearings into the collision between an Army helicopter and a passenger plane ...
A long list of things went wrong in January and contributed to the collision between an Army helicopter and an American ...
Investigators so far have highlighted several factors that may have contributed to the collision, which left 67 people dead.
The investigative minds at Debunked examine the science and safety measures that increase your chances of surviving a plane ...
An NTSB investigation into a fatal helicopter-airplane collision in D.C. revealed a faulty helicopter altimeter and prior ...