WATCH: Mike Waltz tells Cuban delegation 'this is not Havana' during heated UN speech

Cuba’s foreign minister accused the United States of committing an "act of war" by restricting fuel shipments to the island Tuesday, prompting U.S. Ambassador to the United Nations Mike Waltz to deliver a forceful response blaming Cuba’s communist government for years of blackouts, repression and economic collapse. The confrontation unfolded at the U.N. General Assembly one day after Cuba’s national electrical grid collapsed, leaving nearly 10 million people without power. It was the third natio