US Secretary of State Hillary Clinton (L) meets with Russian Prime Minister Vladimir Putin (R) outside Moscow in Novo-Ogarevo on March 19, 2010. (ALEXEY NIKOLSKY/AFP/Getty Images)
US Secretary of State John Kerry (R) with Iran's Foreign Minister Mohammad Javad Zarif April 19, 2016 at the United Nations in New York. (DON EMMERT/AFP/Getty Images)
General view of an apartment block in Pechatniki suburb, southeast of Moscow, after an explosion destroyed four stories out of 18 of the building, September 9, 1999. (STR/AFP/Getty Images)
The Baker test during Operation Crossroads, a series of two nuclear weapons tests conducted by the United States at Bikini Atoll, July 25, 1946. (Galerie Bilderwelt/Getty Images)
Presidents George H.W. Bush, Barack Obama, George W. Bush, Bill Clinton, and Jimmy Carter in the Oval Office on January 7, 2009. (Photo credit should read SAUL LOEB/AFP/Getty Images)