On 13 April 2012, North Korean space officials moved all three stages of a long-range rocket into position for a controversial launch.
They vowed to push ahead with their plan, ignoring international warnings against violating a ban on missile activity.
North Korea said the aim of the launch was to put a satellite into orbit - a move marking the 100th anniversary of the birth of national founder Kim Il-sung.
Countries, including South Korea, Japan and the US, all warned that the launch could have been a cover for a ballistic missile test.
However, after the launch, the missile flew only for a short time before breaking up and crashing into waters off the Korean peninsula.