On 15 May 2006 David Welch, Assistant Secretary of State for Near Eastern Affairs, announced that the U.S. had decided, after a 45-day comment period, to renew full diplomatic relations with Libya and remove Libya from the U.S. list of countries that foster terrorism. During this announcement, it was also said that the U.S. has the intention of upgrading the U.S. liaison office in Tripoli into an embassy. The U.S. embassy in Tripoli opened in May, a product of gradual normalization of international relations after Libya accepted responsibility for the Pan Am 103 bombing. Libya's dismantling of its weapons of mass destruction was a major step towards this announcement.