I would not check the box that you worked outside the country as your trip was only for 2 weeks. I assume the income you earned was included in your US W-2.
However if you did receive any foreign wage income with foreign tax withheld, you should report the income as foreign income and you can claim foreign tax credit on the US return to help offset double taxation. You would need to use the appropriate exchange rate as the income must be translated to USD.
