What date was the sky tower first open to the puplic?

Does the Statue of Liberty hold a scales? How many replaceable filters are there in a Hoover Windtunnel? Bridge over Niagara Falls? Was hagia Sophia in constantinople? What is the name of the seaway from the Atlantic ocean and the great lakes? How can you warn people to stop the ways in which they damage mountains? What do you need to buy a season pass at sandy hook? How far from Cairo to the Sahara Desert? When was Jemseg River Bridge created? What four waterways surround the US? How long are you underneath the channel tunnel for? How are ocean breezes formed? How many people have been blown off the Mackinac Bridge? What types of people originally settled in the Everglades? What desert is sometimes called The Great Salt Desert? What countries do you fly over to Gibraltar? What lake does the grand river empty into? What are two ways that road salt can enter rivers and lakes? What is a huge sea wave caused by an earthquake or a volcanic eruption called? Why is tutbury castle built where it is?