Endosymbiosis occurs when a symbiont lives inside the body or the cells of another organism. It is a very widespread phenomenon in living things. Examples are: Rhizobia: nitrogen-fixing bacteria which live in root nodules on plants of the pea family.
Aviation ordnancemen are a close-knit community and one of the few ratings in the U.S. Navy to have their own association, the Association of Aviation Ordnancemen. In addition, the aviation ordnanceman slogan is IYAOYAS, meaning: If you ain't ordnance, you ain't shit.. One of the most notable aviation ordnancemen was Lieutenant John Finn, who came up as an enlisted sailor making it to the rank of chief petty officer.
The Aviation branch is responsible for the coordination of Aviation operations from maintenance to control tower operations to tactical field missions. Army Aviators provide quick-strike and long-range target engagement during combat operations and are often responsible for transporting troops and supplies.