In this August 1995 file photo, Shoko Asahara, leader of the Aum Shinrikyo cult, is seen being driven away from the Tokyo District Court to the Metropolitan Police headquarters after an extension of his detention was approved. The doomsday cult that carried out a deadly nerve gas attack on Tokyo's subways the same year also used the VX nerve agent suspected in the killing of North Korean leader Kim Jong Un's half-brother.  | AP