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Question 1:
The European Space Agency (ECA) had some setbacks too. Two workers died, while inspecting the umbilical mast of the launch pad of Ariane 5. Later, Luc Celle and Jean-Claude Dhainaut were reported to have died of asphyxiation, because of a nitrogen leak. When did this accident take place?
A. 13 May 2005
B. 12 June 1989
C. 5 May 1995
D. 6 December 1996

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