Large trucks packed with explosives have become a grim trademark of modern terrorism, killing 241 U.S. service personnel in Beirut in 1983 and ripping through the United Nations compound in Baghdad in 2003, killing 22, including the world body’s top diplomat in Iraq, Sérgio Vieira de Mello.

But as militants from groups like the Islamic State and al Qaeda look to kill as many civilians in as many places as possible, they’re skipping the cost, expense, and risk of obtaining explosives and instead simply using normal trucks as more mundane — and cheaper — weapons of war. And as the carnage in Nice, France, has made clear, trucks that aren’t used as bombs can kill as many people as those that are.

