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A police car blocks the entrances to the Tennessee Naval Reserve Center on Thursday July 16 in Chattanooga, Tennessee. Authorities say Mohammod Youssuf Abdulazeez, 24, opened fire first on a military recruiting station at a strip mall and then moved to an operational support center operated by the U.S. Navy seven miles away, where he killed four U.S. Marines.   The gunman was also killed.
A police car blocks the entrances to the Tennessee Naval Reserve Center on Thursday July 16 in Chattanooga, Tennessee. Authorities say Mohammod Youssuf Abdulazeez, 24, opened fire first on a military recruiting station at a strip mall and then moved to an operational support center operated by the U.S. Navy seven miles away, where he killed four U.S. Marines.   The gunman was also killed.

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    States increase security for military installations

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States increase security for military installations

CNN's Sara Ganim reports some state leaders are calling for more security at national guard centers and military installations.

States increase security for military installations

CNN's Sara Ganim reports some state leaders are calling for more security at national guard centers and military installations.