EXPLOSIVE CHARGE U.S. soldiers at an 11-day advanced leadership course stand ready as an explosives charge explodes on Camp Grafton, N.D., April 11, 2010. The soldiers are National Guard and Reserved combat engineers. The 20 students participating in this course were divided into five teams, which rotated to detonate 11 explosive devices. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 168242-W-UYY32-434.jpg Photo Gallery