After a decade of economic depression near the end of the 1930's, ominous sounds of war awakened American industry. Skilled tradesmen had disappeared in the ten year lapse and innovation was not needed when the country stood still. Even new technologies such as aviation had been neglected by the War Department who suddenly needed airplanes and sought entrepreneurs to build them. Mr. Puro was one of many college boys hired at the Glen L. Martin Company to learn drafting as the company was struggling to find experienced engineers to design airplanes from knowledge not yet fully available.
After two years he moved closer to home to work as a machine designer throughout the war for Triumph Explosives, Inc. at Elkton Maryland. The company was a leading supplier of anti-aircraft ammunition to equip Navy ships and also made a large variety of ammunition for other armed forces.
Mr. Puro considered those six years to be the training ground for his next thirty-two years as Ordnance Design Engineer with the U.S. Chemical Corps. He served in lead positions to meet requirements for special products in important military operations of that era.
The accident-free development of the national stockpile of Nerve Gas ammunition engineered by the Ground Munitions Branch under his supervision, is a hands-on story clarifying much misunderstanding about Nerve Agent weapons.