A letter from two dozen House members and Senator Chris Van Hollen urges the Department of Transportation and FAA to pause use of the AI-enabled SMART air traffic tool launched over the National Capital Region on September 21, 2026, citing little transparency, no visible safety evaluations, and short or no notice to frontline controllers. The letter cites the January 2025 midair collision that killed 67 people, asks whether the tool was properly tested as high-impact AI under OMB rules, and demands answers by October 19, 2026.