The first launch attempt, in November 1956, failed after 26 seconds of flight.

Out of 12 launch attempts between 1965 and 1975, 9 were successful.

The next launch attempt of three further rockets on September 14, 1958 was successful.

Further launch attempts were available at the same time each day until 19 June 2010.

If another launch attempt is not made in the next ten days, then it could face cancellation.

If this were the case for Sunday's launch attempt, it would be consistent with what has been seen in the past.

However, similar claims were made in 1998 for Kwangmyŏngsŏng-1, whose launch attempt is believed to have failed.

The engine exploded on first launch attempt 30 June 1953.

The next launch attempt was scheduled for around 14:38 pm on 4 July 2006.

The first launch attempt on 25 February 1966 looked as though it would be the real thing.