Question: What event from December 2001 is featured in the documentary Afghan Massacre: The Convoy of Death?

Context articles: Kabul attack on Canadian Embassy guards
Afghan Massacre: The Convoy of Death
Constitutional Loya Jirga
2001 UK Championship (snooker)
Afghan Interim Administration
Mohammed Alim Razm
Presidency of Hamid Karzai
Abdul Rahim Karimi
The Private Life of a Masterpiece
Dasht-i-Leili massacre

On June 20, 2016, at around 0600 AFT, a suicide bombing attack claimed to be conducted by the Taliban or the Islamic State of Iraq and the Levant hit a convoy of Canadian embassy security guards en route to the embassy in Kabul.
 The attack took place in the ninth police district in the Benayi area, Kabul, Afghanistan.
 The victims were Nepalese contractors, with some sources claiming that there were also Afghan contractors, and other sources claiming that the Afghan nationals were not security contractors and were instead nearby.
 Other sources also claimed that there were two Indian guards among the dead.
 Many civilians at a nearby market were among the nine people injured in the blast, some seriously.
 The attack occurred during the holy month of Ramadan.
 The incident sparked debates on the presence of foreign workers in conflict-countries, with many criticising the Canadian government for negligence.
 There have been debates on this subject before, especially after the Nisour Square massacre, a very different situation.
Afghan Massacre: The Convoy of Death (earlier title: Massacre at Mazar) is a 2002 documentary by Irish filmmaker Jamie Doran and Afghan journalist Najibullah Quraishi about alleged war crimes committed by the Junbish-i Milli faction of the Afghan Northern Alliance under General Abdul Rashid Dostum against Taliban fighters.
 The Taliban fighters, who had surrendered to Dostum's troops after the November 2001 siege of Kunduz, were transported to Sheberghan prison in sealed containers.
 Human rights groups estimate that hundreds or thousands of them died during and after transit.
 "Afghan Massacre: The Convoy of Death" presents testimony from interviewees stating that American military personnel were present at and complicit in some of the mass killings, known as the Dasht-i-Leili massacre.
Afghan leaders who met at the December 2001 Bonn Conference which picked Hamid Karzai to lead the Afghan Transitional Authority also agreed that a Constitutional Loya Jirga should be convened to draft a new constitution.
The 2001 UK Championship was a professional ranking snooker tournament that took place at the Barbican Centre in York, England.
 The event started on 3 December 2001 and the televised stages were shown on BBC between 8 and 16 December 2001.
The Afghan Interim Administration (AIA), also known as the Afghan Interim Authority, was the first administration of Afghanistan after the fall of the Taliban regime and was the highest authority of the country from 22 December 2001 until 13 July 2002.
Mohammed Alim Razm, an ethnic Uzbek, is a former Afghan government minister.
 Between December 2001 and July 2002 he was Minister of Mines and Industries in the Afghan Interim Authority.
 Subsequently he was Minister of Light Industries in the Afghan Transitional Administration until October 2004.
The Karzai administration was the government of Afghanistan under President Hamid Karzai, who became the head of state of Afghanistan in December 2001 after the Taliban government was overthrown.
 Karzai was appointed at the 2002 Loya Jirga as the Interim President of the Afghan Transitional Administration.
 After the 2004 Afghan presidential election, he became the President of Afghanistan.
Abdul Rahim Karimi was Minister of Justice of Afghanistan between December 2001 and October 2004 in the Afghan Interim Authority and the Afghan Transitional Administration.
 He was replaced by Sarwar Danish when Karzai reshuffeled his cabinet when he was elected president in 2004.
The Private Life of a Masterpiece was a BBC arts documentary series which told the stories behind great works of art; 29 episodes of the series were broadcast on BBC Two, commencing on 8 December 2001 and ending on 25 December 2010.
 It initially ran for five seasons from 8 December 2001 to 17 April 2006, for a total of 22 episodes; each episode was 50 minutes long.
 A seven-DVD box set of the first five series was released in 2007, which re-arranged the documentaries into genres from art history.
 A further seven episodes were broadcast between 24 December 2006 and 25 December 2010.
 The series has been widely broadcast around the world, often in re-voiced into national languages.
 The original narrations were done by the actor Samuel West.
 Works of art featured range from Michelangelo's "David" for the first episode to Filippo Lippi's "Adoration of the Christ Child" for the last.
The Dasht-i-Leili massacre occurred in December 2001 during the U.S. invasion of Afghanistan when, depending on the sources, between several hundred to several thousand Taliban prisoners were shot and/or suffocated to death in metal shipping containers while being transferred by Junbish-i Milli soldiers under the supervision of forces loyal to General Rashid Dostum from Kunduz to Sheberghan prison in Afghanistan.
 The site of the graves is believed to be in the Dasht-e Leili desert just west of Sheberghan, in the Jowzjan Province.