BRUSSELS – The rescue of Ingrid Betancourt and 14 other hostages who had been held for years by FARC guerrillas marks more than a turning point in Colombia’s long war against its drug-running, Marxist guerrillas. It also confirms the emergence of a new troika of Latin American leaders – Colombia’s President Alvaro Uribe, Brazilian President Luiz Inácio Lula da Silva, and Mexican President Felipe Calderón – who are set on finishing off Latin America’s destabilizing drug cartels and guerrilla movements, as well as isolating the region’s demagogic upstart, Venezuelan President Hugo Chávez.