Cuban President Fidel Castro makes a point as he speaks before a national TV audience in Havana, April 22, 2002. Cuba's relations with long-time ally Mexico reached a new low on Monday after Castro repeatedly called Mexican President Vicente Fox a liar, and made public a private conversation between them to prove it. Castro insisted Fox lied about the Cuban leader's hasty departure last month from a U.N. aid summit in Monterrey, Mexico. REUTERS/Rafael Perez