Yemen's leadership, government and people expressed appreciation of the Custodian of the Two Holy Mosques King Abdullah bin Abdulaziz Al Saud and President Sheikh Khalifa bin Zayed Al Nahyan of the United Arab Emirates for the emergency aid they provided for Yemen to alleviate the suffering of Yemeni people in light of the political and economic crisis which has been experienced by Yemen, a Yemeni official source told Yemen News Agency today. The source said this aid reflects the depth of relations between the political leaderships in Yemen and the two brotherly countries.