GATEWAY ARCH TURNS 40 YEARS OLD

Visitors to the top of The Gateway Arch look out of the small windows during its 40th birthday celebration in downton St. Louis on October 28, 2005. The tallest monument in the United States, designed by Eero Saarinen, took two and a half years to errect and was built for its simplicist design but later became a symbol of the Gateway to the West. (UPI Photo/Bill Greenblatt)