The National Museum of the Pacific War presents an interview with Charles Kayhart. Kayhart joined the Army in December of 1942. He completed training in radar and radio engineering. He served with the 3116th Signal Service Battalion. Kayhart’s headquarters were in Hawaii. He set up an underground radio station, installing and fine tuning all radio transmitters. He completed the same work on Iwo Jima in order to have direct communication with the Pentagon in Washington, DC, with San Francisco and with all of the Orient. Kayhart and his crew completed the installation on the island during the battle, and shares details of his experiences. He returned to the US and received his discharge in March of 1946.