Investigators are set to brief lawmakers on the DC midair collision Thursday | Here's what we know
Briefly

In the wake of a tragic midair collision between a military Black Hawk helicopter and an American Airlines plane near Washington, DC, investigators from the NTSB and FAA are working diligently to understand the incident. Conflicting radar data has emerged regarding the helicopter's altitude at the time of the collision, with some reports indicating it was at 300 feet while others suggest it was at 200 feet. As recovery efforts from the Potomac River continue, the FAA has suspended helicopter routes over the area indefinitely, prioritizing safety as they gather more data.
The NTSB is grappling with conflicting altitude data as it works to piece together how the collision unfolded.
The FAA has indefinitely suspended the use of most designated helicopter routes over the Potomac.
Read at ABC7 Los Angeles
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