Edith M. Lederer, The Associated Press UNITED NATIONS (AP) — The United Nations chief and representatives from Western nations berated Russia’s top diplomat as he chaired a U.N. meeting Monday, accusing Moscow of violating the U.N. Charter by attacking Ukraine and occupying part of its territory. Russian Foreign Minister Sergey Lavrov responded by defending his country’s military action and accusing the U.S. and its allies of undercutting global diplomacy, the foundation of the United Nations, which was created to prevent a third world war. Secretary-General Antonio Guterres called cooperation among the U.N.’s 193 member nations the organization’s “beating heart” and...