Roosevelt's Rough Riders victory site, San Juan Hill, Strip of land connecting North and South America, Isthmus of Panama, Deadliest natural disaster location, Galveston, Texas, Large earthquake and fires location, San Francisco, California, Poor Man's Paradise amusement park, Coney Island, First successful airplane flight location, Kitty Hawk, North Carolina, First center of skyscraper architecture, Chicago, Illinois, America's first subway system location, Boston, Massachusetts, Robert Fulton, steamboat, Alexander Graham Bell, telephone, Garrett Morgan, gas mask, Thomas Edison, phonograph, Wilbur and Orville Wright, airplane, Robert Goddard, liquid-fuel rocket, John D. Rockefeller, Standard Oil Company, James Watt, ideas used for steamboat, World War I, gas mask saved lives.

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