What are the major barriers to entry and considerations in making such a decision?

Instructions:

Please answer the following question in essay format. There is no word limit. I need you to write enough for me to understand that you have mastered the subject matter. What you consider adequate in this regard is up to your discretion. First, please write to me in at the same standard as if you were writing to the President or Board of Directors of your company. Second, please make sure that you have addressed at least 10 separate points for each question asked. Third, please answer in complete sentences.

Exam 1: Deciding to embark on expansion into international markets is a big, important, and potentially both risky and lucrative opportunity for a USA based business. What are the major barriers to entry and considerations in making such a decision? Discuss.