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Investigation cites missed radio transmissions, altitude discrepancies and gaps in military aviation safety oversight.

New notification procedure follows August communication problems involving the presidential helicopter and a regional jet near Reagan National.

Union questions safety of proposed 250-foot structure near Reagan National Airport following FAA no-hazard determination.

Board says 11 of 33 FAA responses fall short, including its position on requiring ADS-B In.

Flights continued at Reagan National during the presidential helicopter’s departure from Washington.

The agency wants lawmakers to reconcile competing House and Senate measures after the August recess.

Measure would direct FAA rulemaking on collision-avoidance systems, airspace procedures and military operations.

Ground stop affected Washington-area airports Friday for the second time in two weeks.

Measure includes collision-mitigation requirements, changes for military aircraft operations and limits on some ADS-B data use.

Measure on ADS-B equipage falls short of two-thirds threshold.