Former US Secretaries of State Henry Kissinger (R) and George Shultz (L) listen while attending the United Nations Security Council meeting during the UN General Assembly at UN Headquarters in New York on September 24, 2009. The UN Security Council on Thursday unanimously adopted a resolution aimed at stemming the spread of nuclear weapons. The 15-member council acted during an unprecedented summit chaired by US President Barack Obama. Getty Images logo Getty Images 1 month ago

Former US Secretaries of State Henry Kissinger (R) and George Shultz (L) listen while attending the United Nations Security Council meeting during the UN General Assembly at UN Headquarters in New York on September 24, 2009. The UN Security Council on Thursday unanimously adopted a resolution aimed at stemming the spread of nuclear weapons. The 15-member council acted during an unprecedented summit chaired by US President Barack Obama.