Major Airports and Station
There is not so much things to say on Airports and Stations in the US except from showing you maps. Thus here is a map for the major international airports in the country:
What I think is interesting to say regarding this map is that it's the opposite from the map of the biggest cities. If you remember well, these cities were mainly in the South and West whilst the airports are mainly in North and East. The following maps shows the railway network in the United States: