UNITED NATIONS - A U.N. agency is in the middle of an escalating war of words between Washington and Caracas after awarding President Chavez of Venezuela its $5,000 Jose Marti prize, bestowed in Havana by Cuban dictator Fidel Castro. The prize, given by the U.N. Educational, Scientific, and Cultural Organization and, according to its Web site, intended to promote the heritage and values of Latin America, has been obscured from the public eye for more than a decade. As Friday's awards ceremony became an occasion for spreading anti-American sentiment, the Marti prize, and Unesco's choice of Mr. Chavez as its...