I saw one instance where someone was granted a fiancé visa, only to be turned away at the border because they answered "yes" for the question of having smoked p

I saw one instance where someone was granted a fiancé visa, only to be turned away at the border because they answered "yes" for the question of having smoked pot once on one of the visa application forms. Unfortunately a visa does not guarantee access into the United States. You can stil be turned away or detained at the border.