Senate Armed Services Committee Chairman Sen. Carl Levin, D-Mich., left, welcomes Defense Secretary Chuck Hagel on Capitol Hill in Washington, Wednesday, April 17, 2013, as he arrives to testify ... more 
Senate Armed Services Committee Chairman Sen. Carl Levin, D-Mich., left, welcomes Defense Secretary Chuck Hagel on Capitol Hill in Washington, Wednesday, April 17, 2013, as he arrives to testify before the committee's hearing on the Pentagon's budget for fiscal 2014 and beyond. Levin issued a statement saying an aide in his Saginaw, Mich. Office had received a suspicious-looking letter. "The letter was not opened, and the staffer followed the proper protocols for the situation, including alerting the authorities, who are now investigating," the Michigan Democrat said in a statement. (AP Photo/J. Scott Applewhite) less 
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Associated Press | Photo By J. Scott Applewhite
Wed, Apr 17, 2013 2:16 PM EDT