The week of September 18th is Welcoming Week, where Americans honor the contributions of immigrants, refugees and asylees. Thanks to their contributions, and our American tradition of welcoming them to our shores, America is a far richer nation. On September 21st, History Colorado embraces this time-honored tradition by hosting the U.S. Citizenship and Immigration Services (USCIS) Naturalization Ceremony. The History Colorado Center will welcome 50 immigrants, as they become U.S. citizens.