President Obama pauses while speaking about the situation in Iraq on Thursday. Obama said the U.S. will send up to 300 military advisers to Iraq and set up joint operation centers. Jacquelyn Martin/AP hide caption

itoggle caption Jacquelyn Martin/AP

Iraqi Shiite tribesmen show their enthusiasm Tuesday for joining Iraqi security forces in the fight against Islamist militants who have taken over several northern Iraqi cities. Haidar Hamdani/AFP/Getty Images hide caption

itoggle caption Haidar Hamdani/AFP/Getty Images

Senate Intelligence Committee Chair Sen. Dianne Feinstein, D-Calif., questioned whether phone companies would retain calling data. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP

Dianne Feinstein, chairwoman of the Senate Intelligence Committee, speaks to reporters in April. She tells NPR she's "not particularly" comfortable with the CIA vetting the "Torture Report." Molly Riley/AP hide caption

itoggle caption Molly Riley/AP

An Mi-17 helicopter used by the Afghan air force sits on Bagram Air Field in Afghanistan in May 2013. The Pentagon purchases the Russian-made helicopters for the Afghan air force, but recent sanctions may put that deal in jeopardy. Kristin M. Hall/AP hide caption

itoggle caption Kristin M. Hall/AP

Computer hacking experts from the National Security Agency and various branches of the U.S. armed services try to break into remote networks set up by competing U.S. military service academies. The hackers'€™ war room is in a building in Columbia, Md., owned by Parsons, a U.S. defense contractor. David Welna/NPR hide caption

itoggle caption David Welna/NPR