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'A red line': Taliban says any extension of Aug. 31 deadline for U.S. withdrawal would 'provoke a reaction'

Taliban spokesman Suhail Shaheen tells Sky News' Sally Lockwood that the August 31 deadline for U.S. troops to withdraw from Afghanistan is "a red line" -- and they won’t agree to extend it. U.S. and allied troops are busily evacuated tens of thousands of Afghan citizens from the country via Kabul airport.