Add Yahoo as a preferred source to see more of our stories on Google. A coast Guard barge with crane drifts by in the background as emergency response units continue to search the crash site of an ...

Add Yahoo as a preferred source to see more of our stories on Google. Helicopters flew above altitude limits or close to landing and departing airplanes almost daily at Washington's Reagan National ...

However, not all innovations are equal and nor do they follow a constant upward trend. Instead, their evolution takes the form of an S-shaped curve that reflects their typical lifecycle from early ...

Feb. 1 (UPI) --Investigators are analyzing data from the airliner, helicopter and control tower for the mid-air collision that killed 67 Wednesday night, and the U.S. Army has identified the third ...

Helicopters flew higher than allowed or close to landing and departing airplanes almost daily at Washington's Reagan National Airport in the year before January's deadly midair collision, a CBS News ...