The United States scrambled fighter jets to intercept an unresponsive plane as it flew over Washington D.C. and later crashed into the mountains of Virginia, officials said. The F-16 jets caused a loud sonic boom that was heard around the region, prompting concern from some residents.   Four people were onboard the Cessna, a source familiar with the matter said.  No survivors were found at the crash site, Virginia state police said.   🔗 Incidents involving unresponsive pilots are not unprecedented. Read about this crash and others like it at our link in bio.   #Reuters #topnews #topstories #videonews #sonicboom #DCsonicboom #sonicboomwashington #sonicboomfighterjet #fighterjet #F16