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
Arctic policy of Barack Obama to shoal waters in close proximity to the proposed two-way route where the consequences of a grounding could be particularly severe. The Coast Guard received several public comments that identified this area as being of particularly high concern." Arctic policy of Barack Obama see also: Northern Bering Sea Climate Resilience Area, Presidency of Barack Obama Early on in his campaign, former President Barack Obama made it clear that climate change was a priority for his administration. Soon after becoming President Elect in November 2008, he reiterated this positing stating: “Now is the time to confront this challenge once and for