Mexican Roberto Jimenez and his partner had planned a joyful vacation in Cuba, but their trip was interrupted when a national blackout hit the Caribbean island. "We had a bad experience," he says. "We already knew that the country was not doing particularly well, but the blackout was tough," says another tourist, Amaya Garcia, in Havana. Electricity has been restored to nearly 90 percent of Havana, the Cuban capital's power company reports, but several provinces remained without power four days after the start of a nationwide blackout. IMAGES AND SOUNDBITES