** FILE ** Sen. Susan Collins, R-Maine, the ranking member of the Senate Homeland Security Committee, right, accompanied by the committee's Chairman Sen. Joseph Lieberman, I-Conn., gestures during a news conference on Capitol Hill in Washington, Tuesday, July 24, 2012. (AP Photo/J. Scott Applewhite)

Photo by: J. Scott Applewhite

** FILE ** Sen. Susan Collins, R-Maine, the ranking member of the Senate Homeland Security Committee, right, accompanied by the committee's Chairman Sen. Joseph Lieberman, I-Conn., gestures during a news conference on Capitol Hill in Washington, Tuesday, July 24, 2012. (AP Photo/J. Scott Applewhite)