Investigators are examining the actions of the military pilot and air traffic control. The Federal Aviation Administration has long struggled with a shortage of controllers. Full NTSB ...

which provides the crew altitude information based on air pressure readings. In the older Black Hawks, crews check that the barometric altimeter is working before each flight by manually turning a ...

which is a weather instrument that measures air pressure. Materials needed for this experiment include a glass jar, a pencil, a straw, a toothpick or sewing needle, a spool, a marked index card ...

It was the first commercial aviation disaster to surpass 100 deaths and led to major changes in how air traffic was controlled ... and writes the Cruising Altitude column for USA TODAY.

The data indicates the Army Black Hawk helicopter was flying above 200 feet (61 meters), the maximum altitude for the route it was using. The NTSB has completed interviews with air traffic ...

Data from air traffic control radar showed the military ... according to the NTSB. The maximum altitude for helicopters in the area — which is also a flight path for jets going into and out ...

However, data gathered from the air traffic control tower read that the military helicopter was flying at an altitude of about 200ft upon colliding with the commercial plane. The approximate 100ft ...