WASHINGTON — The United States Mint celebrated a milestone this month when it announced the first shipment of a new batch of quarters bearing the image of the writer and poet Maya Angelou, the first Black woman to be depicted on the 25-cent coin.The announcement came weeks after President Biden said he would nominate Ventris C. Gibson to lead the Mint, where, if confirmed, she would serve as its first Black director.But beneath the public signs of social progress is an agency that has struggled for years with racial tension, with Black employees saying they feel threatened, marginalized and professionally disadvantaged. While instances of racism at the Mint have surfaced in previous years, a new internal report that was reviewed by The New York Times depicts an institution rife with tumult over allega …
