US Army Chemical Corps Officer
The Army Chemical Corps defends against chemical, biological, radiological, and nuclear weapons.
The insignia for the U.S. Army Chemical Corps represents the scientific duties of the Chemical Corps. The six-pointed ring in the center is a benzene ring, which represents the six Carbon and six Hydrogen atoms that make up benzene.
The tube looking parts of the insignia are retorts, which is a container like a test tube that is used in laboratory experiments.