03/28/2008 02:46 am ET Updated May 25, 2011

As Obama Security Rises, Lapses Remain

Last May, Sen. Barack Obama, D-Ill., was issued a full-time Secret Service detail, an unusual event so early in the election season, but one that reflected the potential threat against him.

Yet, despite the intense security ring protecting the presidential candiate, questions remain about security, especially among the huge crowds the candidate draws.

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