Misc: What is the fear of being locked in an enclosed place known as?

Questions

Tourists who are eager to visit recently erupted volcanoes while on vacation should take heed. Volcanic ash has been known to remain hot for a period of nearly --------------?

The largest city on the Mississippi River is -----------------?

The largest lake in Australia is --------, measuring 3,420 square miles (8,885 sq. km).?

Towering more than a mile above the ----------- valley known as Jackson Hole, the awe-inspiring Grand Teton rises to 13,770 feet above sea level. Located south of Yellowstone National Park, twelve Teton peaks reach higher than 12,000 feet elevation, high enough to support a dozen mountain glaciers. Youngest of the mountains in the Rocky Mountain system, the Teton Range displays some of the North America's oldest rocks. About 4,100,000 people visit Grand Teton National Park every year.?

Turkey's largest city, -------------, played a central role in Greek history. Called Constantinople, it was capital of the Byzantine Empire. The name ------------ was not officially adopted until 1930.?