Enlisted personnel are identified by way of their various 'E' grades ranging from E-1 to E-9. For those service branches recognizing a Warrant Officer rank, 'W' grades range from W-1 to W-5. Likewise Officers are scaled from O-1 to O-10.
China has quite a collection of natural bridges, including one that experts say has the longest span of any natural bridge in the world. The Fairy Bridge (Xianren Qiao), in southwestern China's Guangxi Zhuang Autonomous Region near the border with Vietnam, has a 400-foot span.
Life at Lake Powell is good. Rainbow Bridge National Monument. Rainbow Bridge, on the edge of Lake Powell, is the largest natural bridge in the world at 290 feet/88 meters tall and 270 feet/83 meters across. Rainbow Bridge is considered sacred by the Navajo culture as a symbol of deities responsible for creating clouds, rainbows and rain - the essence of life in the desert.