Wolf Blitzer delivers the most important breaking news and political, international, and national security stories of the day. Tune to The Situation Room weekdays 5-7pm ET on CNN.
Investigators say markings were found on Navy Yard shooter Aaron Alexis's gun, and there are new details about his health. CNN's Joe Johns reports.
ELF from shooters gun could mean Exit Life Forever or Ending Life Forever
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The Situation Room with Wolf Blitzer is the command center for breaking news, politics and extraordinary reports from around the world. Tune in weeknights from 5-7pm ET on CNN.
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