Weapons of Mass Destruction

I remember when the term "WMD" referred to nuclear, biological and chemical weapons. Apparently, regular explosives are now WMD's:

The indictment continues: "According to the plan, the Hutaree would attack law enforcement vehicles during the funeral procession with Improvised Explosive Devices with Explosively Formed Projectiles, which, according to the indictment, constitute weapons of mass destruction."