Defense Secretary James Mattis, center left, meets with members of the U.S. mission at NATO headquarters in Brussels, Wednesday, Feb. 15, 2017.
Defense Secretary James Mattis, center left, meets with members of the U.S. mission at NATO headquarters in Brussels, Wednesday, Feb. 15, 2017. Brigitte Brantley Department of Defense
Defense Secretary James Mattis, center left, meets with members of the U.S. mission at NATO headquarters in Brussels, Wednesday, Feb. 15, 2017. Brigitte Brantley Department of Defense