The United Nations said Saturday that 50 countries have ratified a U.N. treaty banning nuclear weapons, paving the way for its entry into force on Jan. 22, a move praised by anti-nuclear activists but opposed by the United States and other nuclear powers.The Treaty on the Prohibition of Nuclear Weapons, however, puts on the spot Japan and other countries that shelter under the nuclear umbrella of the United States.U.N. Secretary General Antonio Guterres commended the 50 countries and saluted "the work of civil society, which has been instrumental in facilitating the negotiation and ratifica…READ FULL ARTICLE