The Saudi economy and infrastructure was developed with help from abroad, particularly from the United States, creating strong links between the two dissimilar countries, and considerable and problematic American presence in the Kingdom. The Saudi petroleum industry under the company of ARAMCO was built by American petroleum companies, U.S. construction companies such as Bechtel built much of the country's infrastructure, Trans World Airlines, built the Saudi passenger air service; the Ford Foundation modernized Saudi government; the U.S. Army Corps of Engineers built the country's television and broadcast facilities and oversaw the development of its defense industry.[9]