Lots of mis-info here. Call US Visa Experts in BKK for a free consult. They do many CR-1 Spousal visas to the USA for the past 18 years. Talk to Ning, the office manager.
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If you get married in Thailand and have a long term visa (Spousal visa) your wife can apply for the B-2 tourist visa to attend the wedding. It is a difficult visa to achieve, but a good application and supportive evidence will increase your odds of success.