A.M. Edition for Jan. 31. Officials investigating Wednesday’s deadly aviation disaster near Washington, D.C. recover the “black boxes” from the American Airlines jet involved in the crash. WSJ aviation reporter Ben Katz says crisscrossing flight paths and near misses around Reagan National Airport had been on pilots’ radars for years. Plus, White House aides prepare more targeted trade measures against Canada and Mexico as President Trump’s tariff deadline looms. And the FDA approves a new painkiller meant to eliminate the risk of addiction. Luke Vargas hosts.

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