May 24, 2011, London, England, three weeksafter the death of Osama bin Laden,President Obama conducted a state visit to Britainunder heavy security, moving about the cityin a motorcade consisting of ...

NARRATOR: They are the most advanced and heavily protectedvehicles ever built, operated by technicians preparedfor the worst.JOSEPH J. FUNK: We were taught how to crashthrough a blocking vehicle.What ...