Havana. The Caribbean nation of Cuba has once again been plunged into complete darkness. On Saturday evening, Cuba's Ministry of Energy announced that the national power system across the country had completely collapsed and that the process of restoration had begun.This incident has directly affected more than ten million citizens. This blackout is the second major crisis within a week. Electricity supply had previously been cut off nationwide on Monday, from which the country had not yet fully recovered.These continuous disruptions clearly indicate the fragile state of Cuba's energy infrastructure. The main causes of the energy crisis are cited as...