Power is back on in Spain and Portugal, but questions remain about Monday’s blackout. Here’s what we know
By Robert Picheta, CNN (CNN) — Electricity is pulsing through Spain and Portugal again after a massive outage knocked out power in both countries on Monday. So too are questions. It remains unclear what caused the sudden and staggering blackout, which plunged tens of millions of people into darkness and paralyzed life on the Iberian
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