I wasn't here (OKC) at the time but everything points to handiwork of mooselimbs. My mom recorded live TV and during the first few hours they were searching for a middle eastern looking male in a brown pickup truck.
Read The Third Terrorist by Jayna Davis. She was a special guest here on FR back in the summer of '04 and answered a lot of questions about the book.. interesting that things she wrote at the time and was pooh-poohed about Terry Nichols have proven to be true for certain.