Iranian President Mahmoud Ahmadinejad accused the U.S. of committing acts of terror, Monday, and rejected allegations that his country is developing nuclear weapons.
Speaking at the United Nations Nuclear Nonproliferation Conference in New York City, Ahmadinejad claimed leaders have offered not "a single credible proof" that Iran has nuclear arms, and that any developments being made are for energy purposes only.
"Regrettably, the government of the United States has not only used nuclear weapons, but also continues to threaten to use such weapons against other countries, including Iran," Ahmadinejad said.
Representatives from the U.S., Britain and France walked out during his speech.
It's widely believed Iran is enriching uranium in order to build a nuclear weapon.
The Obama administration is pushing for tough international sanctions against the regime. Iran has refused to cooperate with resolutions on its nuclear program.