Ofcr Cullins was on military leave assigned to the 1st Explosive Ordnance Disposal Company, 1st Marine Logistics Group, Marine Expeditionary Force. His unit was responsible for going out and dismantling or detonating IED’s. In the first 10 months of 2010 132 Marines had been killed in Afghanistan and 18 killed in October alone. Despite this Ofcr Cullins went out to accomplish his mission every day. Officer Cullins had been called out to investigate a previous IED blast when he was killed by a secondary device at that location.