Marines protect themselves behind a blast blanket from shrapnel produced from a detonation cord with blasting caps during an urban breaching course on Camp Lejeune, N.C., March 3, 2015. Marines protect themselves behind a blast blanket from shrapnel produced from a detonation cord with blasting caps during an urban breaching course on Camp Lejeune, N.C., March 3, 2015. SHARE: Download: Full Size (1.68 MB) Tags: Photo Essays Credit: VIRIN: 479633-W-HCY82-589.jpg Photo Gallery