The College of Aeronautics and Engineering is not able to give any advice on entering a foreign country; you need to check the entry requirements with that country's embassy. However, to return make sure you have a valid passport, valid entry visa (not expired, issued for multiple entries), and that you have had your I-20 or DS-2019 endorsed for travel by an ISSS advisor. International students are not required to register for summer unless it is their first or last semester so there are no registration issues when traveling over summer. Note: If you plan to be out of the country for more than five months, please see an ISSS advisor.