 The firm became involved in a number of projects, including the construction of a seawall at Winthrop, Massachusetts, and a bridge over the Squannacook River.The United States entered World War I in April 1917, and Kenney enlisted as a flying cadet in the Aviation Section, U.S. Signal Corps on 2 June 1917.He attended ground school at MIT in June and July, and received primary flight training at Hazelhurst Field in Mineola, New York, from Bert Acosta.