Misc: These letters define what - RNA?

Questions

On This Day In January 1894 - ______ caused serious damage at the World's Columbian Exposition in Chicago, IL.?

On This Day In January 1900 - U.S. President McKinley placed ______ under military rule.?

On This Day In January 1900 - In South______ , General White turned back the Boers attack of Ladysmith.?

On This Day In January 1901 - The first ______ sanctioned by the American Bowling Congress was held in Chicago, IL.?

On This Day In January 1908 - A ______ train collision occurred in the smoke-filled Park Avenue Tunnel in New York City. Seventeen were killed and thirty-eight were injured. The accident caused a public outcry and increased demand for electric trains.?