Argonne National Laboratory is a state-owned entity headquartered in the US. Established in 1946, the laboratory operates as a multidisciplinary science and engineering research center near Chicago, Illinois, with approximately 4,840 employees. It is operated by the U.S. Department of Energy (DOE) and was originally part of the Manhattan Project, making it one of the DOE's oldest national laboratories. The organization focuses on solving national problems in energy, the environment, and national security through scientific research and technological innovation.