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USA MO SaintLouis 2002MAR06 GatewayArch 013
The Gateway Arch was built to withstand earthquakes and high winds; it sways up to 1 inch in a 20 mph wind, but is built to sway up to 18 inches.
The Gateway Arch was built to withstand earthquakes and high winds; it sways up to 1 inch in a 20 mph wind, but is built to sway up to 18 inches.