In the 1995 Oklahoma City bombing , Timothy McVeigh and Terry Nichols built an IED with ammonium nitrate fertilizer , nitromethane , and stolen commercial explosives in a rental truck , with sandbags used to concentrate the explosive force in the desired direction . McVeigh detonated it next to the Alfred P. Murrah Federal Building , killing 168 people , 19 of whom were children
Oklahoma City bombing
Oklahoma City bombing
Improvised explosive device