Cuba on Monday suffered its third nationwide power outage since the start of the year, causing mounting despair in the face of an energy collapse precipitated by a US fuel blockade. The communist island was already struggling to keep the lights on before US President Donald Trump in January cut off its oil supplies, depleting the dwindling supply of fuel for its power plants. Union Electrica (UNE), the state electricity company, announced a “total disconnection” to the entire island at midday,...