The plane had turned to final and was passing above the airport's helicopter Route 4. The NTSB's Newest Findings From The AccidentCredit: ShutterstockThe NTSB has released its latest findings related to the 2025 midair collision over the Potomac River near Ronald Reagan Washington National Airport. The NTSB said:"We determined that the probable cause of this accident was the FAA’s placement of a helicopter route in close proximity to a runway approach path. " Issues With Helicopter Route 4Credit: ShutterstockThe FAA has closed helicopter Route 4 when Washington-National's Runways 15 and 33 are in use. Understand NTSB findings and their policy implications without jargon.