U.S. Secretary of Defense Mark Esper has urged allies worldwide to increase their defense spending to at least 2 percent of gross domestic product amid threats posed by China, Russia and other actors, the Defense Department said Thursday.The remarks were in line with President Donald Trump's argument that allies should pay their "fair share." The president has repeatedly expressed frustration over the failure of members of the North Atlantic Treaty Organization to meet a target of spending 2 percent of their GDP on defense."To our allies and partners around the world, know that we are commi…READ FULL ARTICLE