PETN, or Pentaerythritol tetranitrate, is one of the most powerful and lethal explosives known to man. It has gained ...

An explosive substance called PETN was found in each of the devices, a source close the investigation has told CNN. What does PETN look like? Pentaerythritol tetranitrate, to give it its full name ...

Belarusian authorities intercepted a van carrying 580kg of the high explosive pentaerythritol tetranitrate (PETN), believed to be of US origin, at the Belarus-Poland border, the State Customs ...