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In this photo provided by Sen. Joe Biden's office, Sen. Joe Biden, D-Del., is seen in his official Senate portrait in the mid 1970's in Washington. Biden has lived a life of second chances, a cycle that's been cruel and redemptive by turns. Now he's starting over once again. Deeply private yet in-your-face, collegial yet ideological, the Delaware senator brings a wealth of foreign policy experience to Barack Obama's Democratic ticket, plus wisdom in the ways of Washington and an infectious enthusiasm for political donnybrooks. (AP Photo)