North Korean leader Kim Jong-Un reporting works of North Korean Workers Party Central Committee during the second-day of the 7th Workers Party Congress in Pyongyang. KCNA/AFP/Getty Images hide caption

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A ballistic surface-to-surface missile is fired by Iran's Revolutionary Guard, during a maneuver, in an undisclosed location in Iran on Wednesday. Omid Vahabzadeh/AP via Fars News Agency hide caption

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People watch a news report at a railway station in Seoul on Feb. 3. North Korea launched a long-range rocket Sunday local time, defying international criticism. Jung Yeon-Je/AFP/Getty Images hide caption

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Sumiteru Taniguchi, 86, a survivor of the 1945 atomic bombing of Nagasaki, walks up to deliver his speech at the 70th anniversary of the atomic bombing in Nagasaki, southern Japan, on Sunday. Eugene Hoshiko/AP hide caption

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NPR's Morning Edition host Steve Inskeep interviews President Obama at the White House on Monday. Maggie Starbard/NPR hide caption

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Obama Compares Iran Deal To A House Under Contract, Awaiting Appraisal
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A Minuteman III missile engine is loaded into a truck for transport to another building for X-raying before being torn down and rebuilt. The Air Force's missile command-and-control structure has been the subject of several recent scandals. Douglas C. Pizac/AP hide caption

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An Iranian security guard at the Bushehr nuclear power plant in 2010. Iran and negotiators from six world powers are trying to work out a long-term deal on Iran's nuclear program. Vahid Salemi/AP hide caption

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The Stickiest Issues In The Iranian Nuclear Talks
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Lt. Raj Bansal and Capt. Joseph Shannon (right) approach Foxtrot-01, a remote nuclear missile base in Nebraska. Geoffrey Brumfiel/NPR hide caption

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Welcome To The Nuclear Command Bunker
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First Lt. Patrick Romanofski (center) and 2nd Lt. Andrew Beckner (left) practice the launch of nuclear weapons. Promotions are now more strongly influenced by hands-on performance in this simulator. R.J. Oriez/U.S. Air Force hide caption

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To Stop Cheating, Nuclear Officers Ditch The Grades
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Anti-nuclear activists (from left) Gregory Boertje-Obed, Sister Megan Rice and Michael Walli, pictured Feb. 6 in Knoxville, Tenn., were sentenced to prison terms on Tuesday for the 2012 break-in at Y-12 National Security Complex in Oak Ridge. Linda Davidson/The Washington Post/Getty Images hide caption

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The National Ignition Facility's 192 laser beams focus onto a tiny target. LLNL hide caption

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Scientists Say Their Giant Laser Has Produced Nuclear Fusion
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Negotiators at their round table in Geneva, where talks are being held about Iran's nuclear ambitions. Denis Balibouse /Reuters/Landov hide caption

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On 'Morning Edition': NPR's Peter Kenyon reports from Geneva
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U.S. Secretary of Defense Leon Panetta is given a traditional Maori welcome onto the grounds of the Government House on Friday in Auckland, New Zealand. Phil Walter/Getty Images hide caption

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