Vice President and Prime Minister of the UAE and Dubai's ruler, Sheikh Mohammed bin Rashid al-Maktoum walks with his wife Jordanian Princess Haya bint Hussein after the eighth and final race of the 16th Dubai World Cup at the Meydan Racecourse in Dubai March 26, 2011. The Dubai World Cup, with a cash prize of $10 million, is horse racing's richest race. REUTERS/Abdullah Muhsen (UNITED ARAB EMIRATES - Tags: SPORT HORSE RACING ROYALS)