How can the US trust the Taliban?: Clarissa Ward presses Taliban spokesperson on al Qaeda

A year after the Taliban seized power in Afghanistan, CNN's Clarissa Ward talks with Taliban spokesman Abdul Qahar Balkhi about the death of former al Qaeda leader Ayman al-Zawahiri following a drone attack by United States in Kabul.

Ward presses the official on claims that the Taliban were unaware of al-Zawahiri's presence in the country.