WASHINGTON, DC - AUGUST 4: U.S. Under Secretary of State Sarah Sewall introduces a panel discussion about Open Government Partnership during the Civil Society Forum at the National Academy of Sciences as part of the first U.S.-Africa Leaders Summit on August 4, 2014 in Washington, DC. The event brings together U.S. and African government leaders, members of African and U.S. civil society and the diaspora, and private sector leaders, focusing on using the knowledge and experience of citizens and civil society to solve the key challenges of our time. (Photo by Pete Marovich/Getty Images)
Special assistant to Prime Minister, Syed Tariq Fatemi, arrives to attend the 10th Asia-Europe Meeting (ASEM) on October 16, 2014 in Milan. The Asia-Europe Meeting (ASEM) was created in 1996 as a forum for dialogue and cooperation between Europe and Asia held every two years alternatively in Asia and Europe. AFP PHOTO / GIUSEPPE CACACE (Photo credit should read GIUSEPPE CACACE/AFP/Getty Images)
US Secretary of State John Kerry (L) speaks while US Secretary of Energy Ernest Moniz (C) and US Secretary of the Treasury Jacob Lew (R) listen during a hearing of the Senate Foreign Relations Committee on Capitol Hill July 23, 2015 in Washington, DC. US Secretary of State John Kerry, US Secretary of Energy Ernest Moniz and US Secretary of the Treasury Jacob Lew appeared before the committee to defend the Obama administrations proposed deal with Iran over the county's nuclear program. AFP PHOTO/BRENDAN SMIALOWSKI (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)
US President Barack Obama (C) speaks alongside Speaker of the House John Boehner (L), Republican of Ohio, and Senate Majority Leader Mitch McConnell (R), Republican of Kentucky, prior to a meeting of the bipartisan, bicameral leadership of Congress in the Cabinet Room at the White House in Washington, DC, January 13, 2015. AFP PHOTO / SAUL LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)
The United Nations Security Council meets on Ukraine May 2, 2014 at UN headquarters in New York. Russia warned Ukraine of "catastrophic consequences" unless it halted a military operation against pro-Russian gunmen while Western powers rounded on Moscow at emergency UN talks. AFP PHOTO/Stan HONDA (Photo credit should read STAN HONDA/AFP/Getty Images)
International Atomic Energy Agency (IAEA) General-Director Yukiya Amano addresses a press conference as part of the Board of Governors meeting at the UN atomic agency headquarters in Vienna on November 28, 2013. Amano said that Iran has invited the agency to visit the heavy water production plant at Arak on December 8, in what would be the first inspection there since August 2011. AFP PHOTO / ALEXANDER KLEIN (Photo credit should read ALEXANDER KLEIN/AFP/Getty Images)
US Secretary of State John Kerry gives a press conference outside the Palais Coburg Hotel, where the Iran nuclear talks meetings are being held, in Vienna, Austria on July 5, 2015. Kerry said that "it is now time" to finalise a historic nuclear deal with Iran, on a ninth day of talks in Vienna between Tehran and major powers. AFP PHOTO / JOE KLAMAR (Photo credit should read JOE KLAMAR/AFP/Getty Images)
WASHINGTON, DC - SEPTEMBER 19: Federal Bureau of Investigation Director James Comey addresses the Intelligence and National Security Summit at the Omni Shoreham Hotel September 19, 2014 in Washington, DC. After one year on the job, Comey outlined his vision for the future of the FBI, including a bigger focus on cyber and the creation of a new intelligence office within the bureau. (Photo by Chip Somodevilla/Getty Images)
NEW YORK, NY - MAY 15: U.S. Senator Charles Schumer (D-NY) speaks at a press conference outside New York Penn Station calling for a greater funding and safety for U.S. railways on May 15, 2015 in New York City. The four point plan comes on the heels of an Amtrak train accident outside Philadelphia that killed 8 people and injured more than 200 others. (Photo by Andrew Burton/Getty Images)
High Representative of the European Union for Foreign Affairs and Security Policy, Federica Mogherini (L) and US Secretary of State John Kerry (R) meet at the table at the Palais Coburg Hotel, where the Iran nuclear talks meetings are being held, in Vienna, Austria on July 7, 2015. Talks seeking a landmark nuclear deal between Iran and major powers may yet fail, a German diplomatic source said during a break in negotiations in Vienna on the eve of a deadline. AFP PHOTO / JOE KLAMAR (Photo credit should read JOE KLAMAR/AFP/Getty Images)
US Secretary of State John Kerry (2nd L) watches on a tablet as the US president addresses the US, at the Swiss Federal Institute of Technology in Lausanne (Ecole Polytechnique Federale De Lausanne) on April 2, 2015, after Iran nuclear program talks finished with extended sessions. European powers and Iran on April 2 hailed a breakthrough in talks on reaching a deal to curtail Tehran's nuclear programme. AFP PHOTO / POOL / BRENDAN SMIALOWSKI (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)
Russian President Vladimir Putin looks on during a press conference in his country residence of Novo-Ogaryova outside Moscow on March 4, 2014. Russian President Vladimir Putin on March 4 said that deposed Ukrainian president Viktor Yanukovych had no political future but asserted he was legally still head of state. AFP PHOTO / RIA NOVOSTI PRESIDENTIAL PRESS SERVICE - POOL / ALEXEY NIKOLSKY (Photo credit should read ALEXEY NIKOLSKY/AFP/Getty Images)
WASHINGTON, DC - MAY 06: Assistant Secretary of State for European and Eurasian Affairs Victoria Nuland testifies during a hearing before the Senate Foreign Relations Committee May 6, 2014 on Capitol Hill in Washington, DC. The committee held a hearing on "Ukraine - Countering Russian Intervention and Supporting a Democratic State." (Photo by Alex Wong/Getty Images)