This just goes to show how difficult it is to have a successful space program:
Korea canceled the launch of the Korea Space Launch Vehicle-1, or the Naro rocket, on Friday after detecting a gas leak in the helium injection system.
Officials of the Ministry of Education, Science and Technology and Korea Aerospace Research Institute said that it would have to postpone the launch by at least three days until engineers and researchers fixed the problem.
Korea has until the end of this month to launch the Naro rocket.
Otherwise, the country will need another clearance from global agencies such as the International Maritime Organization and the International Civil Aviation Organization, and set up new launch dates, along with back-up dates.
Such global agencies need to be informed so that precautionary measures could be implemented in the sky and sea by diverting airplanes and vessels away from the rocket.
Officials discovered on Friday morning during preparations that gas was leaking while they were injecting helium into the first-stage rocket provided by Russia. They saw that the seal covering part of the helium supply line was damaged.
Helium is used to pressurize liquid fuel in the first-stage rocket to provide thrust during the liftoff.
Officials said that the Naro rocket had been taken off from the launch platform, and will need to be disassembled in order to thoroughly examine and fix the problem. [Korea Herald]
You can read the rest at the link, but this also shows that if a country with money and technological know how like the South Koreans is having a hard time developing a successful space program, how much more difficult must it be for the North Koreans to do so as well?