A major turning point was the December 1972 Managua earthquake that killed over 10,000 people and left 500,000 homeless. A great deal of international relief was sent to the nation. Some Nicaraguan historians point to the earthquake that devastated Managua as the final 'nail in the coffin' for Somoza; some 90% of the city was destroyed. Somoza's brazen corruption, mishandling of relief (which prompted Pittsburgh Pirates star Roberto Clemente to fly to Managua on December 31, 1972, to try to help - a flight that ended in his death) and refusal to rebuild Managua, flooded the ranks of the Sandinistas with young disaffected Nicaraguans who no longer had anything to lose. The Sandinistas received some support from Cuba and the Soviet Union.