Bin Laden provided leadership and financial support for the plot, and was involved in selecting participants.  Bin Laden initially selected Nawaf al-Hazmi and Khalid al-Mihdhar , both experienced jihadists who had fought in Bosnia . Hazmi and Mihdhar arrived in the United States in mid-January 2000. In spring 2000, Hazmi and Mihdhar took flying lessons in San Diego, California , but both spoke little English, performed poorly with flying lessons, and eventually served as secondary – or "muscle" – hijackers.  
As city government mobilized to overcome the effects of the attack, the speechwriting department began to plan for the inevitable memorial services. Remote historic figures such as Churchill and Roosevelt gained new relevance with their themes of courage, defiance, and freedom from fear. A biblical quote, John 15:13—“Greater love hath no man than this, that a man lay down his life for his friends”—resonated because hundreds had laid down their lives for thousands of strangers. But for us, the greatest inspiration by far came from the deep grief of ordinary New Yorkers: makeshift memorials of notes and melting candles in parks outside firehouses; the American flags that hung from almost every apartment building; the steadfast souls who stood along the West Side Highway every hour of the day and night for more than a month, holding handwritten signs and cheering the rescue workers on their way to and from ground zero. This was the spirit of a resilient city—outraged, engaged, and unified. Slowly the eulogies began to take shape, common themes woven through the contours of their extraordinary individual lives.
Either the Bush Administration is lying, or most of America’s close allies are. So why hasn’t Congress investigated these foreign intelligence claims? Why hasn’t a single mainstream media article connected all these dots, or given these warnings the coverage they deserve? Either some people within the US government knew the 9/11 attack would happen and did nothing, or some people within the US government failed to heed advice from a dozen foreign governments and properly defend the US from attack. Perhaps both. These people should be removed from office on the grounds of gross incompetence, or face the legal consequences of aiding and abetting terrorism. It seems clear that there are people who fear an investigation, and that that is why these dots are left unconnected.