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 on social media the website's internet virtual phone. In March 2007, the Barack Obama team created an interconnection between a user's account in Obama's official website and Facebook account, so a user may publish activities via sending postings from one to another. In 2008, the Obama presidential campaign spent $643,000 out of its $16 million Internet budget to promote his Facebook account. On June 17, 2008, after Hillary Clinton ended her campaign, number of followers of Barack Obama's Facebook account increased to one million. Meanwhile, in addition to Facebook accounts of Barack and Michelle Obama and Joe Biden, the Obama team created ten