Boeing C-137 Stratoliner procurement of the Boeing 707 was very limited, amounting to three Model 707-153s designated VC-137A. When delivered in 1959 these had four 13,500 lb (6123 kg) dry thrust Pratt & Whitney J57 (JT3C6) turbojets; when subsequently re-engined with 18,000 lbf (80.1 kN) dry thrust TF33-P-5 (JT3D) turbofans they were redesignated VC-137B. Only one other variant served with the USAF: this was the VC-137C "Air Force One" presidential transport, the two examples of which were Model 707-320B Intercontinentals with specialized interior furnishings and advanced communications equipment. Two further non-presidential C-137C aircraft were later added. To supplement its VC-137s, the USAF converted
Barack Obama Sr. Barack II. She divorced him three years later. The elder Obama later went to Harvard University for graduate school, where he earned an M.A. in economics, and returned to Kenya in 1964. He saw his son Barack once more, when he was about ten. In late 1964, Obama Sr. married Ruth Beatrice Baker, a Jewish-American woman whom he had met in Massachusetts. They had two sons together before separating in 1971 and divorcing in 1973. Obama first worked for an oil company, before beginning work as an economist with the Kenyan Ministry of Transport. He gained a promotion to senior