U.S. Flew B-52 Bombers Within 12 Nautical Miles Of China's Man-Made Islands

In what was referred to as a freedom of navigation operation, a pair of USAF B-52H bombers flew within 12 miles of China’s man-made islands in the South China Sea. This flight was the latest in a tit-for-tit military responses between China and the U.S. regarding China’s ambitions in the South China Sea.


Why Were Old Jet Engines So Much More Smoky Than Newer Ones?

The dawn of the jet age saw the skies near major airports raked with thick black smoke trails. These exhaust plumes have largely disappeared from our atmosphere due to continuous jet engine innovations. Here is the story of the jet engine’s amazing change in visual and ecological signature since its introduction into…