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A US B-1B Lancer flies over the Osan Air Base, aiming at reinforcing the US commitment to its key ally in Pyeongtaek on September 13, 2016  / AFP / JUNG YEON-JE        (Photo credit should read JUNG YEON-JE/AFP/Getty Images)
A US B-1B Lancer flies over the Osan Air Base, aiming at reinforcing the US commitment to its key ally in Pyeongtaek on September 13, 2016  / AFP / JUNG YEON-JE        (Photo credit should read JUNG YEON-JE/AFP/Getty Images)

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    US B-1 bombers fly over South Korea in show of force

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US B-1 bombers fly over South Korea in show of force

South Korea is "getting ready for the worst case scenario," the country's Defense Ministry said after North Korea claimed to have tested a nuclear warhead. CNN's Barbara Starr has more.

US B-1 bombers fly over South Korea in show of force

South Korea is "getting ready for the worst case scenario," the country's Defense Ministry said after North Korea claimed to have tested a nuclear warhead. CNN's Barbara Starr has more.