World leaders reached a framework Thursday for a historic deal limiting the Iranian nuclear program, NBC News reported. Iran agreed to curbs on its uranium enrichment program, and it agreed to convert one enrichment plant into a research facility, the State Department said. International inspectors will have regular access to all Iranian nuclear facilities. In exchange, world powers said they would begin to lift punishing economic sanctions on the country once the inspectors have verified that it has made good on the agreement. From the White House Rose Garden, President Barack Obama said the agreement would make the world safer and "cut off every pathway" to an Iranian nuclear weapon. Obama added that “If Iran cheats, the world will know it. If we see something suspicious, we will inspect it." The countries set a June 30 deadline for the final text. "Back to work soon on a final deal," Kerry said on Twitter. He called it a "big day."