The Japanese supercomputer K, pictured in June 2012 at the RIKEN Advanced Institute for Computational Science in Kobe, western Japan. The K computer is currently ranked No. 3 on a list of the 500 fastest supercomputers. Kyodo/Landov hide caption

itoggle caption Kyodo/Landov

Syrian President Bashar Assad speaks during his meeting with the heads and members of public organizations and professional associations in Damascus, on Sunday. Assad acknowledged that the fight against rebels had suffered setbacks, but vowed to win against insurgents. SANA/Reuters/Landov hide caption

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Secretary of State Hillary Clinton testifies in January 2013 before the Senate Foreign Relations Committee on the attack on the U.S. mission in Benghazi, Libya. Mandel Ngan/AFP/Getty Images hide caption

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Georg Kapsch, President of the Federation of Austrian Industry, holds an issue of The Economist during a news conference in Vienna last year. Britain's Pearson PLC says it's in talks to sell its 50 percent share in The Economist Group. Heinz-Peter Bader/Reuters/Landov hide caption

itoggle caption Heinz-Peter Bader/Reuters/Landov

Zachary Gallegos, 23, stands guard outside the Armed Services Recruiting Center on Thursday in Sioux Falls, South Dakota. The Pentagon has asked such self-appointed "armed citizens" to leave, citing security concerns. Kevin Burbach/AP hide caption

itoggle caption Kevin Burbach/AP