Ten former nuclear launch control officers, former Air Force officers, have signed an open letter saying that Trump cannot be trusted to have the nuclear launch codes and that he's too unstable to have his finger on the button. They write that the decision to use nuclear weapons requires composure, judgment, restraint, and diplomatic skill - all qualities that Trump lacks. "On the contrary, he has shown himself time and again to be easily baited and quick to lash out, dismissive of expert consultation and ill-informed of even basic military and international affairs."