 Explosive experts are a critical asset to protecting our national security. First Sergeant Glenn Bona with the 182nd Engineer's SAPRA Company explains the importance of training in the field. Hands-on is a must. I mean, you can give them a PowerPoint, a brief description, or show them a picture of the components of the modern demolition initiators, the MDI that we use, but nothing replaces hands-on. Staff Sergeant Mike Rosa talks about what they will be setting off. We're going to be blowing off three different shock groups out here, basically doing a line main, ring main, and also cratering charges. Rosa explains why they use explosives. Clearing out minefields, clearing out obstacles that soldiers need to stay proficient. Reporting from Fort Devons, I'm Army Staff Sergeant Dean Barnhart.