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.
The Museum of Westward Expansion closed, pending installation of all new museum exhibits. As of March 2, 2015, entry-only ticket or tram ticket required to enter Arch. The nation's tallest monument at 630 feet, the Gateway Arch has beckoned visitors since June 1967. The Gateway Arch commemorates Thomas Jefferson and the role St. Louis played in the westward expansion of the United States.