Twenty years after the first terrorist attack on Manhattan’s World Trade Center, ringleader Ramzi Yousef is still waiting to hear if a federal judge in Denver will lift restrictions that keep him in solitary confinement.

Yousef has been confined in a small cell for almost 24 hours each day since 1996. He is serving a sentence of life plus 240 years at the Supermax prison in Florence, Colo. Attorneys for Yousef say he no longer presents a threat.

According to the Denver Post, the government has asked Judge Richard Matsch, who presided over the trial of Oklahoma City bombing defendants Timothy McVeigh and Terry Nichols, to dismiss a lawsuit by Yousef.

Yousef was found guilty of the Feb. 26, 1993 bombing that killed six and injured more than 1,000.

(AP)