Authorities believe there were no survivors after an American Airlines flight collided with an Army helicopter on Wednesday.

Transportation Secretary Sean Duffy said that the collision between an American Airlines passenger plane and an Army helicopter was preventable.

Newly-confirmed Secretary of the U.S. Department of Transportation Sean Duffy spoke during a press conference Thursday regarding the midair collision between a military helicopter and an American Airlines flight near Reagan Washington National Airport.

Transportation Secretary Sean Duffy, who was sworn in earlier this week, said on Thursday both an American Airlines passenger jet and a U.S. Army helicopter were in standard flight patterns before they collided above Ronald Reagan National Airport near Washington,

Sean Duffy, recently appointed as Secretary of Transport under President Donald Trump, is facing mounting scrutiny following a mid-air collision over .

Secretary of Transportation Sean Duffy informed the public on Thursday that it is not in fact "standard" for aircraft to collide in midair over U.S. airspace. On Wednesday night, an American Airlines passenger jet carrying 64 people and a U.

Transportation Secretary Sean Duffy had been sworn in just hours before the deadly midair collision of a plane and helicopter near Washington, D.C.

An American Airlines plane and an Army helicopter collided Wednesday night near Ronald Reagan Washington National Airport.

An Army Black Hawk helicopter collided with a regional jet near Ronald Reagan Washington National Airport on Wednesday evening, U.S. officials confirmed to ABC News.

New transportation secretary Sean Duffy faces his first crisis as an Army helicopter collides with an American Airlines jet at Reagan Airport, crashing into the Potomac River. All onboard are feared dead.

While landing at Ronald Reagan Washington National Airport in Washington, D.C., on Wednesday shortly before 9 p.m., American Airlines Flight 5342 collided with an Army Black Hawk helicopter and crashed into the icy Potomac River.