In the course of his investigation, Lance revisits the bombing of the Oklahoma City federal building by Timothy McVeigh and Terry Nichols, and he finds "a growing body of evidence" to suggest that Ramzi Yousef may have designed that truck bomb. He devotes a chapter to this possibility, citing potential connections between Yousef and Nichols (who was married to a Filipina). It also emerges that Murad -- Yousef's co-conspirator -- claimed responsibility for the 1995 Murrah Building bombing on the morning it happened. An FBI document confirms it. (Full disclosure: I've spoken to Peter Lance several times, after first hearing about his work-in-progress from a whistle-blower group that champions FBI reform.)
http://www.washingtonpost.com/ac2/wp-dyn/A52078-2003Sep9?language=printer
And "suggests" and "may have" and "possibility" is not DID.
Unless you have new evidence, I have not seen anything that places Nichols and Yousef in the same place in the Philippines at the same time. Weird that they were both there? Yes. But not in and of itself convincing.