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
Speeches of Barack Obama Speeches of Barack Obama Barack Obama served as the 44th President of the United States from 2009 to 2017. Before his presidency, he served in the Illinois Senate (1997–2004) and the United States Senate (2005–2008). It was during his campaign for the United States Senate that he first made a speech that received nationwide attention; he gave the keynote address at the 2004 Democratic National Convention. and stated "there is not a liberal America and a conservative America—there is the United States of America". Obama began to run for president just three years after that speech. In response to a