Alicia Keys attends the 2014 Social Good Summit, a conference examining the impact of technology and new media on social good initiatives around the world on September 21, 2014 in New York City. Taylor Hill/Getty Images hide caption

itoggle caption Taylor Hill/Getty Images

Palestinian onlookers and civil defense members gather at a site where an Israeli military operation left two Palestinians dead in the West Bank town of Hebron Tuesday. Troops killed two Palestinian suspects in the June murder of three Israeli teenagers in the West Bank. Hazem Bader/AFP/Getty Images hide caption

itoggle caption Hazem Bader/AFP/Getty Images

Iraqi Kurdish peshmerga fighters take up positions around the town of Gwer in northern Iraq on Sept. 18. The Kurdish militia is aligned with the U.S. in the battle against the Islamic State. Mohamed Messara/EPA/Landov hide caption

itoggle caption Mohamed Messara/EPA/Landov

A photo released by the U.S. Navy shows the guided-missile cruiser USS Philippine Sea launching a Tomahawk cruise missile against Islamic State targets in Syria on Tuesday. Eric Garst/U.S. Navy/EPA/Landov hide caption

itoggle caption Eric Garst/U.S. Navy/EPA/Landov