FBI agents found explosives apparently related to the 1995 Oklahoma City bombing in the former home of Terry Nichols, who has been convicted of murder and conspiracy in the case. The FBI searched the home several times years ago, but recently received a tip that agents had missed something. A new search uncovered blasting caps and other evidence in a crawl space, buried under rock and dirt. FBI officials said the explosives appeared to have been there since before the bombing, which killed 168 people in a federal office building. But Nichols attorney, Brian Hermanson, said the house had been vacant for long stretches, and somebody may have planted the materials as a hoax.