We start the day's other headlines with the latest back and forth in America's trade war with its northern neighbor.

The White House says a 25% tariff on steel and aluminum will go into effect at midnight tonight for Canada and other U.S. trading partners.

That's after trade advisor Peter Navarro said the U.S. will not be doubling those tariffs after all.

Earlier in the day,

President Trump wrote on his social media platform that he's adding an additional 25% tariff on such products starting tomorrow. Mr. Trump said this was in response to the province

of Ontario raising prices for electricity coming into the U.S. Following Mr. Trump's warning, Ontario's premier Doug Ford wrote on social media that the province

had agreed to suspend its 25% surcharge on exports of electricity to Michigan, New York, and

Minnesota. All this back and forth added to the unease on Wall Street today. The Dow Jones Industrial

average lost nearly 500 points on the day. The NASDAQ slipped about 30 points, but ended

off its lows of the day. The S&P 500 flirted with correction territory during today's session

before ending about 40 points, lower. The National Transportation Safety Board is recommending a ban on some helicopter

flights around Reagan National Airport in Washington, D.C. It comes as part of their preliminary

report on the January collision between an American Airlines jet and a Black Hawk helicopter

that killed 67 people. NTSB chairwoman Jennifer Homandy said today that under current protocol,

helicopters flying a certain route can come within 75 feet of aircraft landing at the airport.

75 feet is very close.

That is far too close of a proximity.

We have stated it's an intolerable risk to aviation safety.

Federal aviation officials had restricted helicopter flights around Reagan Airport immediately following the crash.

Now flights are put on temporary hold when helicopters need to pass by.

In the UK, police arrested a

59-year-old man on suspected manslaughter in connection with yesterday's collision between two ships

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