The American president Wednesday defended the historic agreement reached with Iran Tuesday. Barack Obama said the deal represents the world’s best way to ensure that Iran does not get a nuclear weapon.

The agreement, in his words, “cuts off every single path” for Iran to build a nuclear bomb. And, he said that makes the United States and the world safer.

Also Wednesday, the United States proposed a United Nations measure to end all international restrictions linked to Iran’s nuclear program. However, a U.N. ban on trading arms with Iran would remain in place for five years. A ban on ballistic missiles trade would continue for eight years.