premise: There were also rootless but experienced operatives, such as Ramzi Yousef and Khalid Sheikh Mohammed, who-though not necessarily formal members of someone else's organization-were traveling around the world and joining in projects that were supported by or linked to Bin Ladin, the Blind Sheikh, or their associates.
hypothesis: Bin Ladin was not formally linked to Ramzi Yousef and Khalid Sheikh Mohammed, but was supported by them.