In 2015, what's American made? The U.S. is known for manufacturing — it's part of our identity, though jobs have been lost. They've gone overseas. Technology has changed the way things are made.
Nevertheless, America is still making stuff.
And in terms of jobs, the Los Angeles area is the biggest manufacturing hub in the country. There are a few reasons why. There is plenty of space here to build things like factories, and runways. That beautiful California weather? It's actually great for testing planes year round.