Their Royal Highnesses recently concluded an extensive visit in the United States as guests of the government. They have made a special study of irrigation projects in the United States. The princes at their own farewell reception in the nation's capital Summary: Photo shows (left) King Faisal ibn Abdul Aziz al Saud (1906-1975) who ruled Saudi Arabia from 1964 to 1975 with his half-brother King Khalid bin Abdul Aziz, (1912-1982) who was King of Saudi Arabia from 1975 to 1982. (Source: Flickr Commons project, 2008)