Jul 7, 2005: Four young British Islamists carry out suicide bomb attacks on three underground trains and a bus in London, killing 52 people.
Jul 21: In another attempt to attack London's transport system, homemade bombs fail to explode and the four bombers flee. Police launch the country's biggest ever manhunt.
Jul 22: Mr De Menezes leaves his home in south London, setting off for work. He boards an underground train at Stockwell station, where armed police pursuing him push him to the floor of the carriage and shoot him eight times, killing him.
Jul 23: Police issue a statement saying the man they shot was not connected to the Jul 21 attacks. They later identify him as de Menezes.
Jul 17, 2006: The Crown Prosecution Service says no officers involved in the shooting will face criminal charges, but London's police will be prosecuted under health and safety laws.
Feb 19, 2007: Ms Cressida Dick, the officer in charge of the Jul 22 operation, is promoted to the rank of Deputy Assistant Commissioner.
May 11: The Independent Police Complaints Commission (IPCC) says officers involved in the shooting will not face disciplinary hearings and that no decision has been taken regarding four commanders and tactical advisers.
Aug. 2: An IPCC report clears London police chief Ian Blair of lying about the shooting, but says Assistant Commissioner Andy Hayman, Britain's most senior counter-terrorism officer, did mislead the public and senior figures at the Metropolitan Police.
Oct 1: Trial of Metropolitan Police Service (MPS) on health and safety charges begins.
Nov 1: Jury finds the MPS guilty of endangering the public but clears operation leader Cressida Dick of personal responsibility. The court fines the MPS 175,000 pounds and orders it to pay legal costs of 385,000 pounds.
Dec 21: The IPCC says no disciplinary action will be taken against four senior officers, including Dick. It said they could not be held personally responsible for the mistakes that led to the shooting. -- REUTERS