American Airlines has become the first U.S. carrier to open a service center in Havana, another step toward normalizing travel between Cuba and the United States-and a sign that U.S. businesses hope the new Trump administration will maintain positive relations with the Cuban government of RaAol Castro. The inauguration ceremony, including cutting a red ribbon, took place yesterday at a business center in the upscale, neighborhood of Miramar, Cuba, where other non-U.S. international carriers have long had ticket counters.