What the White House knew

Bush was warned of attacks
Senior US politicians demand answers from the White House over its admission that it had warning of a Bin Laden hijack plot before 11 September.

Combat with al-Qaeda

Ground combat
The Royal Marines have carried out their final operation before coming home from Afghanistan, but was their mission a success or a failure?

Six months on

Ground Zero light show
The United States marks six months since the 11 September attacks with memorial ceremonies for the victims held around the country.

The hunt for al-Qaeda

Al-Qaeda prisoners
More suspected al-Qaeda members are flown to a US detention centre at Guantanamo Bay in Cuba amid concern from human rights groups.

The investigators

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.

Rebuilding Afghanistan

Forging ahead
Afghanistan's new government can expect huge amounts of foreign aid as it begins the task of rebuilding the country's economy after decades of war.

War in Afghanistan

The military campaign
US air power proved crucial in the battle for Afghanistan. After weeks of sustained bombardment, Taleban forces could no longer keep up their resistance and the US-led coalition seized control of the capital, Kabul and then the entire country.

The Humanitarian Crisis

Afghanistan's missing millions
The tragedy of the tens of thousands of civilians displaced by events within Afghanistan.

The International Reaction

Divided loyalties
The mixed reactions across the world to the way the US has retaliated for the September 11th attacks.

The Events of September 11

America's day of terror: Timeline
BBC News Online charts the horrific sequence of destruction which struck terror into the heart of the United States.