Sergei Tsarnaev is accused of using explosives - filled pressure cookers as bombs . He is charged with ` ` using and planning to use a weapon of mass destruction '' ( WMD ) . Saddam Hussein was stockpiling WMDs formed part of the argument for the Iraq War . Bush did , '' Holland said . The term ` ` WMD '' is often used to refer to nuclear , biological and chemical arms .
Sergei Tsarnaev is accused of using explosives - filled pressure cookers as bombs . He is charged with ` ` using and planning to use a weapon of mass destruction '' ( WMD ) . Saddam Hussein was stockpiling WMDs formed part of the argument for the Iraq War . The term ` ` WMD '' is often used to refer to nuclear , biological and chemical arms .