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President Obama admitted Tuesday in a broadcast interview that his nuclear agreement with Iran only delays Tehran from eventually acquiring a weapon, which could come immediately after Year 13 of the agreement -- leaving the problem for future presidents.
Obama made the comments about Tehran's so-called "breakout time" in an interview with NPR News that aired Tuesday morning. The president was attempting to answer the charge that the deal framework agreed upon by the U.S., Iran, and five other nations last week fails to eliminate the risk of Iran getting a nuclear weapon because it allows Tehran to keep enriching uranium.
Obama said that Iran would be capped for a decade at 300 kilograms of uranium -- not enough to convert to a stockpile of weapons-grade material.
"What is a more relevant fear would be that in Year 13, 14, 15, they have advanced centrifuges that enrich uranium fairly rapidly, and at that point, the breakout times would have shrunk almost down to zero," Obama said. 
The stark admission -- after his energy secretary even claimed the deal was a "forever agreement" -- came as the president seeks to quiet a growing chorus questioning whether the deal he and world leaders have negotiated merely delays the certainty of a nuclear-armed Iran. Obama has insisted confidently that Iran will not get a nuclear weapon on his watch, which ends in roughly 20 months, but has made no similar assurances about his successors.