Back بعثات برنامج مكوك الفضاء الملغية Arabic Abgesagte Space-Shuttle-Missionen German Lijst van geannuleerde spaceshuttlemissies Dutch
During NASA's Space Shuttle program, several missions were canceled. Many were canceled as a result of the Challenger and the Columbia disasters or due to delays in the development of the shuttle. Others were canceled because of changes in payload and mission requirements.