Students who hold dual citizenship (most notably students who are US citizens as well as citizens of a country that provides access to visa free travel to their Spring 2015 location) should take careful note to bring both passports with them this semester when they travel.
If you are a US citizen, you must always use your US passport when entering the US, regardless of which passport you used to enter your Spring 2015 study location. When entering your Spring 2015 study location, you should use the passport which provides you with the ability to study there visa-free.
A dual US-EU citizen should use their EU passport when entering the Czech Republic, but their US passport when returning to the US.
Please contact the Office of Global Services at email@example.com or 212-998-4242 if you have any questions.