The hyper loop is supposed to be, for people that don't know, this super fast way of going 700 miles per hour in some tubes underground. So we use the hyper loop as a motivating problem to go through a bunch of these different graph algorithms. And one we find is that the distance that it takes might not matter as much as how many stops we make along the way for something like the hyper loop. It's longer to make a connection at a city than it is to travel between two cities.