[U.S. Secretary of Defense Ash Carter speaks during a media conference at NATO headquarters in Brussels on Thursday, Feb. 11, 2016. NATO defense ministers met for a second day on Thursday to discuss Turkey’s request to help deal with Europe’s ongoing migrant crisis and the current situation in Iraq and Syria. (AP Photo/Virginia Mayo)]BRUSSELS (AP) — NATO's European commander on Thursday ordered three warships to move immediately to the Aegean Sea to help end the deadly smuggling of migrants between Turkey and Greece.