Atomic Energy Commission - 25 Year Anniversary (1971)

This medallion (2" diameter) was produced in 1971 to commemorate the 25th anniversary of the U.S. Atomic Energy Commission (AEC).

The back of the medallion (photo above left) shows an Erlenmeyer flask in the center to symbolize scientific research, a space probe in the upper left, a caduceus in the upper right to symbolize the medical applications of radioisotopes, a nuclear powered submarine in the lower left, and a nuclear power plant in the lower right.

In essence, the AEC was created in 1946 to assume the responsibility for managing atomic energy. Previously, that responsibility had belonged to the US Army, and General Groves in particular. Regarding this transfer of power, Groves described his position as being a mother hen watching strangers take all her chicks. 

Reference

The New World. A History of the United States Atomic Energy Commission. Volume I. Wash 1214. 1972.