President Obama will tell the United Nations on Tuesday that this month’s attacks on U.S. diplomats and missions in Libya and Egypt were an “assault on the very ideals” the institution was founded on.

“If we are serious about those ideals, we must speak honestly about the deeper causes of this crisis. Because we face a choice between the forces that would drive us apart, and the hopes we hold in common,” Obama will say, according to excerpts of the president's speech released by the White House.

“Today, we must affirm that our future will be determined by people like Chris Stevens, and not by his killers. Today, we must declare that this violence and intolerance has no place among our United Nations”

“People everywhere long for the freedom to determine their destiny; the dignity that comes with work; the comfort that comes from faith; and the justice that exists when governments serve their people – and not the other way around,” Obama will say, according to the text.

“The United States of America will always stand up for these aspirations, for our own people, and all across the world,” he will say. “That was our founding purpose. That is what our history shows. And that is what Chris Stevens worked for throughout his life.”

Concerning Iran’s nuclear program, Obama will reiterate that he wants to resolve the issue through diplomatic channels and that “we believe that there is still time and space to do so.”

“But that time is not unlimited,” Obama will say, according to the prepared remarks, echoing what Netanyahu has also said in the past. “We respect the right of nations to access peaceful nuclear power, but one of the purposes of the United Nations is to see that we harness that power for peace.”

Obama will warn that “a nuclear-armed Iran is not a challenge that can be contained.”

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