Against his father's wishes, Peter Fluor expanded Fluor's business outside of California in the 1930s. It built refineries in Texas, as well as oil pipelines and compressor stations from Panhandle, Texas, to Indianapolis, Indiana, for the Panhandle Eastern Pipeline Company. Fluor constructed the Escondida in Chile, which is the second-largest copper mine in the world. In 1942, Fluor constructed cooling towers and other facilities in Hanford, Washington, for the Manhattan Project. It built an expansion of the Dhahran Airfield in Saudi Arabia for the United States Army in the 1950s and accepted its first international project for ARAMCO in the Middle East.