Cuba’s power grid collapsed again early on Saturday morning, just hours after initial progress in restoring the supply had been reported. Following a first nationwide blackout on Friday, power failed again across the country at 6:15 am (1015 GMT) on Saturday morning, according to Cuban state media. The state electricity provider UNE is continuing its efforts to restore supply on the Caribbean island, it said. Despite the efforts, Cuba is largely without electricity with few exceptions, the news website 14ymedio reported. Light was briefly visible in some districts of the capital, Havana, on Sa…