Helmet of Grace Banker, Chief Operator of the U.S. Army's "Hello Girls" and recipient of the Distinguished Service Medal. Displayed with her uniform and a headset of a telephone operator. The Hello Girls were bilingual ladies with special skills that made them kingpins of the vital communications of the U.S. Army and its allies. The lettering on Banker's helmet was added after the war. Many veterans decorated their helmets after the fighting ended.