I'm not sure how much you know about North Korea, but it is a closed country. I actually live less than thirty miles from the DMZ (the border between North and South Korea), but no one is allowed to enter.
There are exceptions, of course. One of our teachers, representative of our aid to bring medicine into the country, is one of the few foreigners allowed in each year.
This teacher is escorted from place to place and only allowed to take pictures of certain places and things. Sarah Carpenter was the teacher spearheading this Dongdaewon and she blogs about her experience here.
Internet isn't allowed and the roads that run through the cities are for pedestrians or bullock carts, because there just isn't enough money to pay for the fuel for cars.