A pen used by U.S. President Barack Obama lies on an executive order prior to signing in the Eisenhower Executive Office Building January 21, 2009 in Washington, DC
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Obama West Point analysis: 'Obama the intellectual'

Mark Mardell analyses President Barack Obama's key foreign policy address.

Mr Obama promised a new US foreign policy based on "collective action" with allies abroad.

Go to next video: Obama West Point speech in full