Барак Обама – единственный президент См. Bruce Blair, “How Obama Could Revolutionize Nuclear Weapons Strategy Before He Goes,” Politico Magazine, June 22, 2016, www.politico.com/magazine/story/2016/06/barack-obama-nuclear-weapons-213981. David E. Sanger and William J. Broad, “Obama Unlikely to Vow No First Use of Nuclear Weapons,” New York Times, September 5, 2016, www.nytimes.com/2016/09/06/science/obama-unlikely-to-vow-no-frst-use-of-nuclear-weapons.html.