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 mass surveillance Barack Obama on mass surveillance U.S. president Barack Obama has received widespread criticism due to his support of government surveillance. President Obama had released many statements on mass surveillance as a result. As a senator, Obama condemned the Patriot Act for violating the rights of American citizens. He argued that it allowed government agents to perform extensive and in-depth searches on American citizens without a search warrant. He also argued that it was possible to secure the United States against terrorist attacks while preserving individual liberty. In 2011, Obama signed a four-year renewal of the Patriot Act, specifically provisions allowing