A screen grab from the surveillance video showing the man who it's suspected set off a bomb aboard a bus full of Israeli tourists in Burgas, Bulgaria. BGNES.com hide caption

toggle caption BGNES.com

An undated screen grab, released by the Kaspersky Lab, showing some of the programming behind Flame. AFP/Getty Images hide caption

toggle caption AFP/Getty Images

International Atomic Energy Agency Director-General Yukiya Amano earlier today in Vienna, after his return from talks in Tehran. Dieter Nagl /AFP/Getty Images hide caption

toggle caption Dieter Nagl /AFP/Getty Images

NPR thanks our sponsors

Become an NPR sponsor