"Thanks to this deal we have seen real progress," Obama stated.
In July 2015, the P5+1 group of countries comprised of the United States, Russia, China, France and the United Kingdom plus Germany, reached an agreement with Iran to ensure the peaceful nature of Tehran's nuclear program in exchange for sanctions relief.
He pointed out that the P5+1 group agrees the nuclear agreement "has achieved a substantial success and focused on the dangers of nuclear proliferation in an effective way."
Since implementing the nuclear agreement, Obama noted, Iran had dismantled two-thirds of its centrifuges, shipped out nearly all enriched uranium stockpile and removed its Arak reactor core.
However, the US president also observed that the agreement "does not resolve all of our difference with Iran."
Following the adoption of the nuclear agreement, the UN Security Council passed Resolution 2231 that calls on Iran to refrain from engaging in activity related to ballistic missiles capable of delivering nuclear weapons, among other issues.
Earlier in March, Iranian state media reported the country’s Revolutionary Guard Corps conducted a ballistic missile launch as one of the last steps in testing the capabilities of Iranian-produced missiles.