Biden has said he is against regime change, but for providing non-military support to opposition movements. He opposed direct U.S. intervention in Libya; voted against U.S. participation in the Gulf War; voted in favor of the Iraq War; and supports a two-state solution in the Israeli-Palestinian conflict. Biden has pledged to end U.S. support for the Saudi Arabian-led intervention in Yemen and to reevaluate the United States' relationship with Saudi Arabia. He has called North Korea a "paper tiger". As vice president, Biden supported Obama's Cuban thaw. He has said that, as president, he would restore U.S. membership in key United Nations bodies, such as the UN Educational, Scientific and Cultural Organization (UNESCO), the World Health Organization, and possibly the Human Rights Council. Biden supports extending the New START arms control treaty with Russia to limit the number of nuclear weapons deployed by both sides.