Gateway Arch celebrates 50th anniversary (7 images)

Members of the St. Louis Fire Department honor guard, ring a bell at exactly the moment the last section of the Gateway Arch was put into place during 50th anniversary ceremonies in St. Louis on October 28, 2015. The 630 foot arch is a timeless symbol of innovation and represents the pioneering spirit of America. Photo by Bill Greenblatt/UPI

Brandi Vehlewald of Destination Desserts, shows some of the 1000 decorated cupcakes being passed out following 50th anniversary ceremonies for the Gateway Arch in St. Louis on October 28, 2015. The 630 foot arch is a timeless symbol of innovation and represents the pioneering spirit of America. Photo by Bill Greenblatt/UPI

St. Louis Mayor Francis Slay (L) presents Tom Bradley, Superintendent of the Jefferson National Expansion Memorial with a proclamation during 50th anniversary ceremonies in St. Louis on October 28, 2015. The 630 foot arch is a timeless symbol of innovation and represents the pioneering spirit of America. Photo by Bill Greenblatt/UPI

Area Boy and Girl Scouts raise an American flag at the moment the last section of the Gateway Arch was installed during 50th anniversary ceremonies in St. Louis on October 28, 2015. The 630 foot arch is a timeless symbol of innovation and represents the pioneering spirit of America. Photo by Bill Greenblatt/UPI