A man looks at an unexploded barrel bomb that landed in a cemetery after being dropped by forces loyal to Syria's President Bashar Assad in the northern Syrian city of Aleppo on Thursday. Reuters/Landov hide caption

itoggle caption Reuters/Landov

Just as characters in the play "Waiting for Godot" wait for someone named Godot, some believe that Iranian President Hassan Rouhani is Iran's only politician who can end the country's waiting when it comes to resolving a nuclear deal. Behrouz Mehri/AFP/Getty Images hide caption

itoggle caption Behrouz Mehri/AFP/Getty Images

Iranian high school students sit for their university entrance examination in Tehran in 2009. Iran's economy has been struggling in recent years, and many graduates feel they have few career options. Mona Hoobehfekr/AFP/Getty Images hide caption

itoggle caption Mona Hoobehfekr/AFP/Getty Images

Low-income Iranians line up to receive food supplies in south Tehran. Iran remains an economy of subsidies, although some direct cash payments have been replaced by food baskets for the poor. Davoud Ghahrdar/AFP/Getty Images hide caption

itoggle caption Davoud Ghahrdar/AFP/Getty Images

U.S. Secretary of State John Kerry speaks during a news conference at the David Citadel Hotel in Jerusalem on Sunday. Brendan Smialowski/AP hide caption

itoggle caption Brendan Smialowski/AP

UN experts are inspecting the heavy water production plant in Arak, Iran, on Sunday. The visit is the first test of an interim deal Iran struck with the West in November. Hamid Foroutan/AFP/Getty Images hide caption

itoggle caption Hamid Foroutan/AFP/Getty Images