The annual summit of Gulf Cooperation Council (GCC) begins in Abu Dhabi today amid security concerns over Iran's nuclear ambitions in the wake of the WikiLeaks revelations. GCC Secretary General Abdul Rahman Al Attiyah has been quoted by Emirates official news agency as saying that the Abu Dhabi summit is being convened at a critical time when the pace is being accelerated to boost joint GCC action and maintain security and stability. He said that the summit will provide a qualitative leap in the joint GCC action and will add several achievements in realisation of the GCC customs union, common market and single currency and economic citizenship. He added that the summit will pass a host of important decisions concerning the GCC power and rail grids and peaceful use of nuclear energy. Gulf Cooperation Council (GCC) grouping consists of Bahrain, Kuwait, Oman, Qatar, Saudi Arabia and the United Arab Emirates.