Richard Gatling, as guessed by Keith Willoughby. He also invented a gun to be mounted on a camel saddle.
Peshtigo, Wisconsin. Bad luck to happen on the same night as the more famous one!
http://www.peshtigofire.info/
The dog was named Balto, as guessed by Don Del Grande. Another dog, named Togo didn't get as much press.
It was too valuable as a radio antenna (also Don Del Grande).
Planet X a.k.a. Pluto.
These were Tim Bernes-Lee's early names for the 'World Wide Web'.
It was the first time the 'Star Spangled Banner' was played before a ball game.