Job description

My job is in the Aerospace Industry, and it's always been a challenge to explain what kind of work I do. At one gathering, I tried several unsuccessful attempted explanations before deciding to be as generic as possible. When the subject came up while I was talking with a group of guys, I replied simply, "Defense Contractor." The men nodded, and as the conversation went on, I silently declared victory to myself. Then, one of them turned to me and asked, "So, what do you put up mainly? Chain-link?"