Usa is synonymous with north america. Whenever foreigners speak of North America there are thinking about Usa but in reality north america is more than two countries. Usa is a large country which just like Canada has several time zones. Usa immigration has only slowed down after 911 but it is still possible to immigrate to the usa. There is an ongoing debate about illegal usa immigration. The usa is both admired and feared and criticized all at the same time. The usa is the most well known and most easily recognisable country around the world. One can find the usa flag in display even in the most remote villages. The usa flag has become almost part of the advertising of especially for multinational companies originally form the usa. The east coast usa is where most of government departments are based, New York and Washington, and the west coast is more of the commercial and entertainment capital. You can find a detailed map of the usa to learn more about its states, cities and time zones.