HAVANA — Scattered protests broke out across Havana on Tuesday evening, with residents banging pots, honking horns and shouting "turn on the lights" as millions of Cubans remained without power amid a six-month-long U.S. fuel blockade. Cuba experienced a nationwide outage on Monday — its third this year — but while authorities said most of the country had been reconnected to the island's grid by late Tuesday, many remained in the dark and without electricity as the island doesn't have enough fuel. The country's grid operator UNE said it had reconnected the grid from Pinar del Rio, in far western Cuba, to Holguin in the east. Santiago de Cuba, the island's second-largest city, remained disconnected and without power, authorities said. The U.S. in January cut off Cuba's fuel supply, then imposed fresh sanctions that have prompted an exodus of foreign businesses and a near-complete collapse of tourism in a bid to force the island's government to the negotiating table. The U.S. is seeking to upend Cuba's communist-run government and has called for democratic elections and the release o