M150 Penetration Augmented Munition
The M150 Penetration Augmented Munition (PAM) is an explosive device developed for the Special Operations Forces of the United States Army, such as Delta Force. It is designed to destroy large, reinforced concrete structures, such as bridges, and was developed by Alliant Techsystems in collaboration with the Lawrence Livermore National Laboratory.
Source: Wikipedia — M150 Penetration Augmented Munition (CC BY-SA 4.0)