MIAMI — Frequently accused by Cuban government officials of supporting dissidents and plotting to overthrow the regime, the U.S. Agency for International Development recently took what seems an unprecedented step and sent personal protective equipment for firefighters to Cuba following a devastating fire at an oil storage facility in August. USAID’s involvement in response to the fire at the Matanzas Supertanker Base that killed 16 people, many of them firefighters, is another step in recent U.S. efforts to re-engage with the Cuban government, as concerns among Biden administration officials a…