SHIBAM, YEMEN - JANUARY 8: A historical town referred to as the 'Manhattan of the Desert' lies in the Hadhramaut Valley on January 8, 2006 in Shibam, Yemen.  Decades of political unrest in the south of the Arabian peninsula have turned a country that was historically a vital region for trade and travel into one of the poorest nations in the Middle East.  (Photo by Matjaz Krivic/Getty Images)