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 2008 presidential primary campaign online performance, measured Obama as the candidate that connected the most with potential voters via the Internet. Chris Hughes, a Facebook co-founder and coordinator of online organizing within the Barack Obama presidential campaign, called the on-line surge backing Obama "unprecedented". One group on Facebook, "Barack Obama (One Million Strong for Barack)", had 894,913 members as of November 5, 2008. Obama's politician page reached more than one million supporters as of June 17, 2008. On February 2, 2007, Obama attended a rally at George Mason University organized by "Students for Barack Obama", a group that began on Facebook, with several thousand