Drought-hit Venezuela awaits rain at crucial Guri dam

By Andrew Cawthorne GURI, Venezuela (Reuters) - Drought has turned parts of the area behind Venezuela's Guri dam, one of the world's biggest, into a desert, but the government is optimistic of rain within weeks to drive the vast installation that provides the bulk of the OPEC nation's power.     On a tour of the hydroelectric complex on the Caroni river, Electricity Minister Luis Motta told Reuters that forecasts showed a 70 to 80 percent chance of rain towards the end of April or