The postal service is celebrating soccer, the World Cup and its history in the United States with a brand new stamp. WASHINGTON — With the World Cup just weeks away, the United States Postal Service is celebrating soccer with a new forever stamp. The mail agency unveiled the North American Soccer Forever stamp at the 2026 Boston World Exposition. The stamp comes as the U.S. prepares to co-host soccer’s biggest tournament with Mexico and Canada on June 11. It’s the first World Cup to be jointly hosted by three countries and the first to feature 48 teams. “America is celebrating…