President Barack Obama today hailed the powers of diplomacy in dealing with Iran, as the nuclear deal struck with the government in Tehran takes effect and “unjustly detained” Americans return home after a prisoner swap.

“Engaging directly with the Iranian government on a sustained basis, for the first time in decades, has created a unique opportunity, a window, to resolve important issues,” Obama said from the White House during a rare Sunday public statement.

He called the new agreement with Iran a “milestone” in making sure it doesn’t get a nuclear weapon.

“We’ve now closed off every single path Iran had to building a (nuclear) bomb,” he said. “We’ll know if Iran ever tries to break out.”

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