Mohammed Atef

KSM says the embassy bombings convinced him that bin Laden was serious.

In late 1998 or early 1999, apparently at the urging of his military chief, Mohammed Atef, bin Laden gives the planes idea a green light.

KSM moves to Kandahar.

In the spring of 1999, the three men meet at a compound near the city and draw up a list of targets: the White House, the Capitol, the Pentagon, and the World Trade Center.