The al-Qaeda investigation

The United States is leading an investigation into the international al-Qaeda network which has already uncovered evidence of activity in the US, Europe, the Middle East and Asia.

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10 June 2002: US 'foils terror attack'

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Al-Mujahir was jailed in the 1990s

US Attorney General John Ashcroft says a US citizen, Abdullah al-Mujahir, was arrested 8 May in Chicago airport after arriving from Pakistan. The suspect is alleged to have been planning to build and explode a radioactive "dirty" bomb, which can spread highly toxic material to humans.

The BBC's Stephen Sackur reports

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15 April:Tape 'shows US hijacker'

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The speaker talked of killing Americans

The Arabic news station, Al-Jazeera, broadcasts pictures of Osama Bin Laden and his deputy with what Al-Jazeera says is the final video address of one of the suicide bombers in the 11 September attacks on the US. It is not known when the tape was made,

 The BBC's Nick Bryant reports

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27 February:US seeks Bin Laden DNA

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Osama Bin Laden

The Pentagon asked the relatives of Osama Bin Laden to provide DNA samples to determine if human remains found in Afghanistan are those of the terror group leader.

 The BBC's Bridget Kendall reports

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18 January: Alleged shoe bomber in court

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Briton Richard Reid pleaded "not guilty" when he appeared before a court in Boston on charges of attempted murder and attempted destruction of an aircraft. He is alleged to have tried to blow up a US airliner in December by detonating explosives in his shoes. US authorities believe he is linked to al-Qaeda.

 The BBC's Stephen Sackur reports

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17 January: FBI video of suspects

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The video was found in the rubble of a house used by a leading member of al-Qaeda

The FBI releases video footage showing suspected al-Qaeda terrorists which it has identified as potential suicide bombers. The US has also collected information from a computer in Kabul linking al-Qaeda to Richard Reid, the man accused of trying to blow up an airliner with a bomb in his shoe.

 The BBC's Gavin Hewitt reports

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2 January : "20th hi-jacker" in court

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Zacarias Moussaoui refused to enter a plea

Zacarias Moussaoui, the first person to be charged over the 11 September attacks, appears in a US federal court in Alexandria, Virginia amid tight security. The so-called "20th hi-jacker" was arrested before 11 September refused to enter a plea and the court entered a plea of not guilty on his behalf.

 The BBC's Louise Bevan reports

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13 December: Bin Laden tape released

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Osama Bin Laden in the video

The US has released a video that it says implicates Osama Bin Laden in the 11 September attacks on New York and the Pentagon, in which more than 3,000 people died.

 The BBC's James Robbins reports

 Watch our interactive version of the video

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