Britain's Prime Minister David Cameron speaks to Sheikh Ahmed Bin Saeed Al-Maktoum (R), Chairman and Chief Executive of Emirates Airlines and Group, and President of Dubai's Civil Aviation Authority, during a visit to the Dubai Metro November 5, 2012. Cameron will visit the Gulf and Middle East on a three-day diplomacy and trade trip this week, his office said on Monday. REUTERS/Jumana ElHeloueh (UNITED ARAB EMIRATES - Tags: POLITICS TRANSPORT BUSINESS)