Incorrect altitude readings on the Army helicopter that collided with a passenger plane over Washington, D.C., in January ...

At their closest points, helicopters and planes routinely flew within 75 feet near the airport, according to the NTSB.

Incorrect altitude readings on the Army helicopter that collided with a passenger plane over Washington, D.C., in January contributed to the aircraft getting too close, but air traffic controllers ...

Customized pricing – where each customer receives a different price for the same product – is a holy grail for businesses because it boosts profits. With customized pricing, free-spending people pay ...