Trump says authorities have "strong opinions" on causes of Washington plane crash

U.S. President Trump briefs reporters on midair collision near Ronald Reagan Washington National Airport, at the White House in Washington

WASHINGTON (Reuters) - President Donald Trump on Thursday said U.S. authorities have "strong opinions" on what caused the deadly collision between an American Airlines regional passenger plane and a U.S. Army Black Hawk helicopter.

"We do not know what led to this crash, but we have some very strong opinions and ideas," Trump said at a news conference.

(Reporting by Steve Holland in Washington; Editing by Chizu Nomiyama)