On this day in history, June 30th, we explore a range of events, from daring feats to tragic events. In 1859, French acrobat Charles Blondin crossed Niagara Falls on a tightrope. In 1908, the largest impact event on Earth in recorded history, the Tunguska Event, resulted in a massive explosion over Eastern Siberia. In 2007, a terrorist attack on Glasgow Airport failed when a Jeep filled with propane canisters drove into the entrance. Join us as we explore the fascinating history of June 30th!