maintain a 40-man undercover unit called "Jihad Kandahar", which is used for undercover operations, including targeted killings. Resurgence after 2001 After the attacks of 11 September 2001 on the United States, Pakistan has been accused of continuing to support the Taliban, an allegation Pakistan denies. In mid-2002 exiled Taliban leaders in Pakistan began reconnecting with each other. They formed the Quetta Shura in the Pakistani city of Quetta. With the fall of Kabul to anti-Taliban forces in November 2001, ISI forces worked with and helped Taliban militias who were in full retreat. In November 2001, Taliban, Al-Qaeda combatants and ISI operatives were evacuated from Kunduz on Pakistan Army cargo aircraft to Pakistan Air Force bases in Pakistan's Northern Areas. Former Pakistani president Pervez Musharraf wrote in his memoirs that Richard Armitage, the former US deputy secretary of state, said Pakistan would be "bombed back to the stone-age" if it continued to support the Taliban, although Armitage has since denied using the "stone age" phrase. Pashtun tribal chief Hamid Karzai was elected as the national interim leader, and the Taliban had surrendered Kandahar following an offer of amnesty by Karzai. However the US rejected a part of the amnesty in which Taliban leader Mullah Omar could "live in dignity" in his native Kandahar. The Taliban were not invited to the Bonn Agreement of December 2001, which many cite has been the cause of the Taliban's battlefield resurgence and the continuation of conflict. This was partly due to the Taliban's apparent defeat but also a US condition that the Taliban would not be allowed to participate. By 2003 the Taliban showed signs of a comeback and not long afterwards their insurgency was underway. UN negotiator Lakhdar Brahimi admitted in 2006 that not inviting the Taliban to Bonn was "our original sin". In May and June 2003, high Taliban officials proclaimed the Taliban regrouped and ready for guerrilla war to expel US forces from Afghanistan. In late 2004, the then hidden Taliban leader Mohammed Omar announced an insurgency against "America and its puppets" (i.e. transitional Afghan government forces) to "regain the sovereignty of our country". On 29 May 2006, while according to American website The Spokesman-Review Afghanistan faced "a mounting threat from armed Taliban fighters in the countryside", a US military truck of a convoy in Kabul lost control and plowed into twelve civilian vehicles, killing one and injuring six people. The surrounding