Plane collides with Blackhawk helicopter Washington DC

[Zaphod58]

Hmmm…

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Where's the evidence of a helicopter? Audio recording of it? Anything?

Edit:

I tracked down and listened to the ATC audio, and he reported an RA. The only traffic was PAT01 which was below the threshold for an RA. They were descending through 1900 when PAT01 was told about them, and he was in Route 3 moving to Route 4. Route 3 runs 1400 feet to below 300 feet.  Route 4 starts at 1,000 feet or below, and drops to 200 feet or below. Route 3 runs from the Beltway (Interstate 495/95), running at or below 1400 except between Woods Corner and Greenbelt which is at or below 1000. From From Woods Corner to Wilson Bridge at or below 800, crossing the Potomac at or below 300 feet, south of Wilson Bridge. 

Route 4 requires at or below 1000 at Fort Washington, 600 feet abeam of Broad Creek Inlet, arriving at 300 feet over Wilson Bridge, and 200 feet or below north of Wilson Bridge.