Speculation is damaging to probe of midair collision over Potomac River, writes CNY man who flew that route hundreds of times ...

NTSB investigates Blackhawk altitude discrepancy, missing communications in Potomac midair and transmissions that were not received.

The helicopter crew may have had bad information on the altitude from their altimeter, as the pilots had differing altitudes in the seconds before the crash, the NTSB said. Emergency response ...

The NTSB took over the investigation shortly after the incident and offered its first press conference on the incident in nearly two weeks on Friday. National Transportation Safety Board ...