One of five suspects charged with plotting to bomb a highway bridge in Ohio wants to exclude trial evidence that he threatened to bomb his seventh-grade principal. Attorney Anthony Vegh told a federal judge in Akron that information about the threat by Douglas Wright of Indianapolis when he was 12 years old would prejudice the jury. The judge said Thursday he will take up the issue next month. All five men have pleaded not guilty. They allegedly tried to detonate what turned out to be a dud bomb provided by an informant. Brief details of the alleged school threat were included in a transcript of the FBI's interview of Wright. He told the FBI agent he never carried through on the school threat. No bomb materials were found.