Preparing Detonation Cord Army Spc. Maryi Burnside, left, and Sgt. Vic Harper prepare a piece of detonation cord with that will be attached to a block of composition C4 explosives at McCrady Training Center, in Eastover, S.C. April 10, 2016. Burnside and Harper are assigned to the Florida National Guard’s 779th Engineer Battalion. Air National Guard photo by Sgt. Brad Mincey SHARE: Download: Full Size (0.52 MB) Tags: Combat engineers, South Carolina National Guard, ruck march, McCrady Training Center, 218th Regiment, 868th and 869th Engineer Company’s, florida, Soldiers Credit: Sgt. Brad Mincey VIRIN: 160410-Z-WS267-107.JPG Photo Gallery