Top US Commander in Afghanistan talks 'mother of all bombs'


In an NBC News exclusive, Gen. John Nicholson, discusses the impact of dropping the "mother of all bombs," the most powerful non-nuclear bomb in the American arsenal. See more Friday on NBC Nightly News With Lester Holt.

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Lester Holt
Award-winning journalist and anchor of "NBC Nightly News” and “Dateline NBC.”