Marine One's crew made repeated failed attempts to warn Reagan National before departing, leaving controllers unable to halt a commercial jet takeoff.
https://www.foxnews.com/politics/trump-helicopters-radio-warnings-went-unheard-before-close-call-passenger-jet-report-says
https://www.foxnews.com/politics/trump-helicopters-radio-warnings-went-unheard-before-close-call-passenger-jet-report-says