North Korean scientists work at the West Sea Satellite Launch Site, at the satellite control centre of the Korean Committee of Space Technology on the outskirts of Pyongyang April 11, 2012. North Korea said on Wednesday it was injecting fuel into a long-range rocket ahead of a launch condemned by its neighbours and the West. The launch is set to take place between Thursday and next Monday and has prompted neighbours such as the Philippines to re-route their air traffic. REUTERS/Bobby Yip (NORTH KOREA - Tags: POLITICS MILITARY SCIENCE TECHNOLOGY)