Cuban leader Fidel Castro made a surprise visit to Venezuela Tuesday for what he described on arrival as an ''historic encounter'' with his top ally, President Hugo Chávez, and Caribbean leaders in his fourth trip to Venezuela since 1999 and his first outside of Cuba since late 2003. Venezuelan state television showed Castro arriving at the Caribbean port of Puerto La Cruz aboard a Cubana de Aviación jetliner, wearing his traditional olive green fatigues, as the leftist-populist Chávez waited for him. Although rumors of a Castro visit to Venezuela had been making the rounds in Caracas for several days, Chávez...