What caused the deadly mid-air collision in Washington, DC?

What's known about the deadly collision between an American Airlines regional jet and a U.S. Army Black Hawk helicopter at Ronald Reagan Washington National Airport; what we're learning about the victims; and what U.S. President Donald Trump is blaming for the tragedy. The Canadian export that might be exempt from Trump's tariffs. Why Israeli Prime Minister Benjamin Netanyahu delayed the release of Palestinian detainees. Plus, one food bank's fishy windfall: the big donation that came with a big catch. Learn more about your ad choices. Visit megaphone.fm/adchoices