Need for a Continental Tech Strategy

From windmills to NATO, Donald Trump let the world have it from the podium of the World Economic Forum. For more than an hour, the president of the United States took on all-comers in his first return to Davos in six years. We ask about the latest threatening language on tariffs and grabbing Greenland, and how an audience of corporate executives feels about a showdown with Europe that's rekindled the threat of a trade war.