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.
Delicate Arch is formed of Entrada Sandstone. The original sandstone fin was gradually worn away by weathering and erosion, leaving the arch. Other arches in the park were formed the same way but, due to placement and less dramatic shape, are not as famous.