CHICAGO (CBS) -- What is the Loop in Chicago? You ask, we answer. Put most simply, the Loop is the center of the downtown area. If you ask many Chicagoans, they would likely tell you it is bounded ...

Landing a tailwheel airplane is really no different than landing a tricycle airplane, until the wheels touch down. That is because the CG in a tailwheel, or conventional gear airplane is aft (or ...

Closed loop recycling is the process of collecting and reprocessing recycled goods without losing the integrity of the original material. In a closed loop, goods are recycled over and over again and ...