Weekly Quiz: Unwanted Gifts, Unidentified Objects, and Unchecked Algorithms

WASHINGTON, D.C. — As both Canada and the United States enjoyed a day off and family BBQs on Monday, U.S. President Donald Trump was busy posting on his social media platform. In one update, he declared that Canada’s aerospace giant, Bombardier, could no longer sell in the United States. “NO MORE SELLING BOMBARDIER IN THE UNITED STATES! Their products aren’t good enough! Over 50% of their revenue comes from the United States,” the president wrote. He complained that Canada blocked Gulfstream Aerospace from doing business in Canada — a reference to a certification issue earlier this...