A Kansas man accused of plotting a suicide bomb attack at the Wichita airport will soon face his punishment.

U.S. District Judge Monti Belot is scheduled to sentence Terry L. Loewen on Monday.

The 60-year-old man pleaded guilty in June to attempting to use a weapon of mass destruction. He struck a deal with prosecutors for a 20-year sentence that the judge has said he's "almost certain" to impose.

The former avionics technician was arrested in 2013 while trying to bring a van filled with inert explosives onto the tarmac at what was then called Mid-Continent Airport.

The Center on National Security at Fordham Law School says Loewen's case is among 462 terror prosecutions associated with groups such as al-Qaida and the Islamic State since the Sept. 11 terrorist attacks.