All my sons: Drama in three acts

All My Sons is a 1947 play by Arthur Miller. It is based upon a true story, which Arthur Miller's then mother-in-law pointed out in an Ohio newspaper. The news story described how in 1941 43 the Wright Aeronautical Corporation based in Ohio had conspired with army inspection officers to approve defective aircraft engines destined for military use. The story of defective engines had reached investigators working for Sen. Harry Truman's congressional investigative board after several Wright aircraft assembly workers informed on the company; they would later testify under oath before Congress. In 1944, three Army Air Force officers, Lt. Col. Frank C. Greulich, Major Walter A. Ryan, and Major William Bruckmann were relieved of duty and later convicted of neglect of duty.