This video explain how we can build a skycreaper. We can see the connectors, the recruiters and riveters give shape 13,000 tons of steel in the the skeleton of a skyscreaper, this building took a big velocity because it finished two years later in Los Angeles. According to the video the skyscreapers are the main symbol of a city, because symbolise innovation, creativity and power. The investor hires an architect, in this video the investor make a competition to luck for new ideas and new ways of constructions. The video have others parts, but I think that this one was the more important and more interesting.