The US today said it will work diligently and forcefully to push for reform of the UN Security Council. The White House also reaffirmed its support for India's quest for permanent seat in the top world body.The spokesperson of the National Security Council Mike Hammer told foreign journalists in Washington that the UN no longer reflects some of the realities of today and US will continue to work on that.Reforming the Security Council, he said, is one of the top foreign policy agenda of the Obama Administration. At the same time he acknowledged that such a reform would take time.