U.S. diplomatic personnel reopened the U.S. Interest Section in Tripoli on February 8, 2004. In the same month, the U.S. State Department lifted the 23-year travel ban on Libya. The U.S. Interest Section was upgraded to a U.S. Liaison Office on June 28, 2004, and to a full embassy on May 31, 2006. The establishment in 2005 of an American School in Tripoli demonstrates the increased presence of Americans in Libya, and the continuing normalization of bilateral relations. Libya re-established its diplomatic presence in Washington with the opening of an Interest Section on July 8, 2004, which was subsequently upgraded to a Liaison Office in December 2004 and to a full embassy on May 31, 2006.