After a car attempted to crash a gate outside the NSA Monday morning, Maryland state police blocked the freeway entrance that accesses the agency's headquarters in Fort Meade, Md. Patrick Semansky/AP hide caption

itoggle caption Patrick Semansky/AP

Secretary of State John Kerry (left), and Russian Foreign Minister Sergey Lavrov (right) wait for the start of a meeting at the Beau Rivage Palace Hotelin Lausanne, Switzerland, on Sunday to discuss a nuclear deal on Iran. Brendan Smialowski/AP hide caption

itoggle caption Brendan Smialowski/AP

People examine the rubble following an air strike near the airport in Yemen's capital Sanaa on Thursday. Saudi Arabia said it carried out bombing raids in neighboring Yemen as Houthi rebels, allied with Iran, continued their offensive in the country. Yemen's president fled the country Wednesday and was reported to be in Saudi Arabia on Thursday. Khaled Abdullah/Reuters/Landov hide caption

itoggle caption Khaled Abdullah/Reuters/Landov

FBI headquarters in Washington. An independent review says the bureau has made strides since Sept. 11 but "needs to accelerate its implementation of reforms." Pablo Martinez Monsivais/AP hide caption

itoggle caption Pablo Martinez Monsivais/AP

A cell block at the now-closed Abu Ghraib prison in Baghdad, a facility notorious for photos released in 2004 showing U.S. soldiers torturing and humiliating inmates. Karim Kadim/AP hide caption

itoggle caption Karim Kadim/AP

Secretary of State John Kerry delivers a statement about the recently concluded round of negotiations with Iran over their nuclear program at the International Olympic Museum in Lausanne, Switzerland, on Saturday. Brian Snyder/Reuters/Landov hide caption

itoggle caption Brian Snyder/Reuters/Landov