Trump's ex-advisor lists Biden's mistakes as Taliban celebrate American exit

US President Joe Biden has blamed many people - ranging from his predecessor Donald Trump, to the Afghan defence forces, and Afghan president Ashraf Ghani who fled the country for the Taliban's quick victory. The two parties he has not blamed are himself and the Taliban. This is the biggest criticism of the US Commander-in-Chief by Russell A. Berman, who served as an advisor on the US State Department's policy planning staff during Trump's presidency. Watch the full video for more.