SAPPER SECURITY Army 1st Sgt. Gerald Eagan throws his rucksack in front of him while pulling security detail during a heliborne insertion mission as part of the Order of the Arctic Sapper competition on Joint Base Elmendorf-Richardson, Alaska, Aug. 17, 2011. Eagan is assigned to the 6th Engineer Battalion. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 465676-L-PET49-162.jpg Photo Gallery