回复：回复：急!!! 登陆加拿大返美需签证否？高手们，请赐教

Thank you for your reply. Can you give more information on that, say, such as some official web sites or personal experience? As I said, I was getting different answers. I am sure if we clarify this question here, many people will benefit from it since this is actually a typical case in the US. Thanks again.;