From the U.S. State Department's website:<br />
"In general, marriages which are legally performed and valid abroad are also legally valid in the United States. Inquiries regarding the validity of a marriage abroad should be directed to the attorney general of the state in the United States where the parties to the marriage live."<br />
Unless the marriage breaks U.S. laws, it will be recognised. There may be a little extra paperwork involved but that's all.