Who did it and how? US shows confidence in proving bin Laden ties The Bush administration is confident its inquiry has uncovered substantial evidence linking the attacks to the Saudi fugitive. |  Read German police confirm report on suspects Investigators have confirmed that the German police had compiled a detailed report on the activities in the country of supporters of Osama bin Laden, whom the US blames for the September 11 attacks. |  Read Attacks aided by 'privatisation of terrorism' The assault on the US on September 11 cost as much as $2m, according to western intelligence, some of which may have come indirectly from wealthy benefactors in the Arab oil states of the Gulf. |  Read Huge obstacles in global search for terrorist paper trail It is hard to imagine how intelligence and law enforcement agents could close down the money network that sustains Osama bin Laden's terrorist group. |  Read Arrests made in Belgium, France and the UK Two arrests in Brussels brought to 13 the number of people arrested in Belgium, the UK and France as part of anti-terrorism investigations connected with the September 11 attacks in the US. |  Read German police issue two arrest warrants German authorities have issued international arrest warrants for two Arab men in connection with last week's terrorist attacks in the US. |  Read Arrested man may provide a link to bin Laden Federal authorities have arrested a Middle Eastern man who may provide investigators their closest tie yet to Osama bin Laden, the Saudi fugitive who is the prime suspect in the terror attacks in New York and Washington. |  Read Governments 'may have given help to hijackers' Federal authorities have uncovered evidence that a number of foreign states supported the terrorist network. |  Read Germans shocked by evidence of terror bases Police in Germany stepped up their nationwide search for evidence linked to the attacks in the US, as people began asking why the country had been chosen as a base for international terrorism. |  Read Wall St banks confirm probe on 'suspicious' deals A number of Wall Street banks confirmed they were conducting internal investigations into their brokerage businesses, amid fears they may have unwittingly carried out transactions for associates of Osama bin Laden. |  Read Fight against terrorism will be a 'marathon' The world has reached a "critical moment" in terms of the "magnitude of the threat" terrorists now pose, said Donald Rumsfeld, US defence secretary. |  Read Saudi alarm at identity of hijackers About half the suspects in the suicide attacks on the US have names of families from Saudi Arabia. |  Read Rumsfeld says several states may harbour terrorism Donald Rumsfeld, US defence secretary, has said the US would seek to "drain the swamp" inhabited by terrorists. |  Read