President Donald Trump said he wanted what amounted to a nearly tenfold increase in the U.S. nuclear arsenal during a gathering this past summer of the nation's highest-ranking national security leaders, according to three officials who were in the room. Trump's comments, the officials said, came in response to a briefing slide he was shown that charted the steady reduction of U.S. nuclear weapons since the late 1960s. Trump indicated he wanted a bigger stockpile, not the bottom position on that downward-sloping curve. According to the officials present, Trump's advisers, among them the Joint Chiefs of Staff and Secretary of State Rex Tillerson, were surprised. Some officials present said they did not take Trump's desire for more nuclear weapons to be literally instructing the military to increase the actual numbers. But his comments raised questions about his familiarity with the nuclear posture and other issues. Two officials present said that at multiple points in the discussion, the president expressed a desire not just for more nuclear weapons, but for additional U.S. troops and military equipment. Any increase in America's nuclear arsenal would not only break with decades of U.S. nuclear doctrine but also violate international disarmament treaties signed by every president since Ronald Reagan. Nonproliferation experts warned that such a move could set off a global arms race.