Tuesday's announcement of a deal on Iran's controversial nuclear program caps more than a decade of negotiations.
UN Secretary General Ban Ki-moon says the deal is "a testament to the value of dialogue."
"I hope, and indeed believe, that this agreement will lead to greater mutual understanding and cooperation on the many serious security challenges in the Middle East. As such it could serve as a vital contribution to peace and stability both in the region and beyond."
Ban's comment was echoed by Chinese Foreign Minister Wang Yi.
"The most significant achievement of the agreement is that it safeguards the international nuclear non-proliferation treaty. Iran made the political promise that it will not develop nuclear weapons, and the ot
