The Air Force has officially certified 100 percent of its aircraft to operate on a 50-50 blend of petroleum fuel and an alternative fuel known as Fischer-Tropsch Synthetic Paraffinic Kerosene, according to a service official. The Fischer-Tropsch fuel is a synthetic fuel that can be derived from coal or natural gas, and on April 16, the Air Force's alternative fuels certification office received notice that its Fischer-Tropsch process is complete, Jeff Braun, the certification office's director, told Inside the Air...
