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The collision happened around 9 pm (01:00 in Lisbon), when the plane was approaching Washington airport.
A plane with 64 people on board shocked a military helicopter in the US capital, Washington DC and crashed into the Potomac River.
The American Airlines airline confirmed in a statement that a PSA regional subsidiary plane was carrying 60 passengers and four crew, after moving from Wichita, Kansas.
The US Department of Defense said they were following the Sikorsky H-60 Three Military Helicopter and .
The collision took place around 9 pm (01:00 in Lisbon), when the plane was approaching Washington airport, the Aviation Federal Administration said.
Authorities confirm at least 18 dead, whose bodies have already been recovered.
