Authorities have said there were no survivors of the collision between the American Airlines regional jet and a U.S. military helicopter over the Potomac River. <br /><br />The NTSB is investigating possible causes, including communication failures, mechanical issues, and low visibility due to cold weather. Black box recovery efforts are underway. <br /><br />President Trump has vowed a swift release of findings, while leadership changes in transportation and defense may impact the investigation.<br /><br />#US #PlaneCrash <br />
