Industrial revolution

Nikola Tesla (Thomas Edison's ex-worker and rival) was a marvelous inventor and receives little to no credit on his inventions or work.

The Erie canal was a man made canal and it was significant to the U.S. because it was used to transport goods.
Free enterprise is the freedom to own a private business without government regulations. An entrepreneur is a person who is a business man who is seeking profit. They were important because they literally generate wealth. They literally generate wealth, while existing companies only redistribute their wealth, entrepreneurs, by starting a new company, they introduce new sources of wealth into their economy; first by creating new services and products people can buy and second by providing jobs for people who need them. 
Crude oil is the single most important resource that the U.S. had to help them turn themselves into an industrial worldwide power.
Black gold was significant because oil is used for everything such as machines that produce goods that can be sold to other countries. 
Steel was manufactured using the Bessmer process, which involved injecting air into molten iron to remove impurities. 
Buildings changed and improved because William Le Baron Jenner designed the first skyscraper with a steel frame that led to many more steel frame buildings.

Remote control boat used by Nikola Tesla credited as the birth of Robotics.

GE Aviation is located in Cincinnati, Ohio and this place is historical because it's where the wright brothers did there airplane testing and it is also the birthplace of aviation.
Subtractive is when you take away from the metal while additive is when you put the parts on other parts reducing leftover materials and now your making less parts.
Direct Metal Laser Melting is when Laser melts together powdered metal until the design is fully grown. They make turbines more durable and make smaller lighter parts.
in my opinon this new industrial revolution is changing how we view things for example, instead of having a lot of big strong people we can  now have regular creative people working machines that'll make parts by simply typing in what you want. This saves money and space.

Nikola Tesla's blade-less centripetal flow turbine.