Aircraft Noise: Better Information Sharing Could Improve Responses to Washington, D.C. Area Helicopter Noise Concerns. GAO-21-200: Published: Jan 7, 2021. Publicly Released: Jan 7, 2021. “We were asked to review helicopter noise in the Washington, D.C., area, where numerous flights support government, national security, and medical operations. There were about 88,000 helicopter flights within 30 miles of Reagan National Airport in 2017-19, including about 33,000 military and 18,000 law enforcement flights. The Federal Aviation Administration has improved its ability to identify and respond to noise complaints. But the FAA and helicopter operators don’t always tell each other about the complaints they receive. We recommended that the FAA develop a way to share this information to improve responses to these complaints.” [h/t Pete Weiss]