| http://www.w3.org/ns/prov#value | - A A Zbigniew Brzezinski, national security adviser in the Jimmy Carter administration, is endorsing Sen. Barack Obama for the Democratic presidential nomination.Brzezinski, a key foreign-policy expert for the Democratic Party, told Bloomberg Television that Obama has a better global grasp than Sen. Hillary Rodham Clinton.Obama ``recognizes that the challenge is a new face, a new sense of direction
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