"The second BIF/Chicago connection concerns Wali Khan Amid Shah, alleged to be a "key participant" in a Philippines-based plot to bomb 12 U.S. airliners in 1994, among other plots. What's interested about Wali Khan is that, in addition to BIF links outlined in the court filings, he was also rumored to have met with Terry Nichols, who with Timothy McVeigh was convicted of having committed the OK bombing. This theory is proposed and expounded at length in what sounds like a rousingly paranoid literary outing called Others Unknown: Timothy McVeigh and the Oklahoma City Bombing Conspiracy."
Notice the book though is well-written not by a paranoid, but Timothy McVeigh's lawyer
I'd like an answer to this question myself.