It`s not new for us that people from one country with its specific culture can marry people who live in other country with different culture. So, if you are a foreigner and you plan to marry a citizen of the United States, the following information would be highly useful for you.
There is so called a K-1 non-immigrant visa, also known as a Fiancé(e) visa. This type of visa is designed for the foreign nationals coming to the United States to marry American citizens and live here. It permits the foreigners to travel to the United States and marry his or her U.S. citizen sponsor within 90 days of arrival.
But if you plan to marry a foreign national outside the United States or your fiancé(e) is already residing legally in the U.S., you do not need to file for a K-1 visa.
How do you like the fact that during 2013, there were 173 million non-immigrant admissions to the United States and 26,046 of these admissions were fiancé(e) visas (K-1). You can read about this in U.S. Department of Homeland Security (DHS).