Most railroads ran east-west to enable to move quickly across the plains and mountains.

People. Goods were also moved quickly across the east and the west.  Never before had any form of transportation allowed people to get from the easy to the west in a quick amount of time. Before the railroads the United States was not unified because its economy, people, and communications spread so slowly or not at all. 

Europe needs to build a trump-like wall that will spread across europe making it impossible for migrants to cross they need to spread pig guts all over this wall so the muslims will never consider crossing into europe..you might be asking "can't they just fly over with planes? " well yes they can so we will install thaad missile protections system to shoot down any aircraft that violates europe's air fourth would be to start a fourth reich in germany.. last but not least.. make europe great again!

A) it is created from magma