Sens. John McCain, R-Ariz., (left) and Jack Reed, D-R.I., hear testimony on operations against ISIS from Gen. Lloyd Austin. Pablo Martinez Monsivais/AP hide caption

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Members of the Minneapolis Somali community waited in May to enter the U.S. Courthouse where a federal judge ordered four Minnesota men, accused of trying to travel to Syria to join ISIS, to be held pending trial. Jim Mone/AP hide caption

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This booking photo taken in April and released by the Hamilton County, Tenn., sheriff's office shows a man identified as Mohammod Youssuf Abdulazeez after being detained on suspicion of a driving offense. AP hide caption

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FBI Director James Comey testifies that Congress should require digital encryption programs to allow access by law enforcement. The issue pits privacy against public safety. Carolyn Kaster/AP hide caption

itoggle caption Carolyn Kaster/AP