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The day of the Concorde crash – level 2
25-07-2000Concorde was a fantastic plane. It was built in 1969. It...
The day of the Concorde crash – level 3
25-07-2000The development of the supersonic plane Concorde took seven years. The...
The day GPS was fully operational – level 1
17-07-1995GPS is a system which gives information about your location on...
The day GPS was fully operational – level 2
17-07-1995The Global Positioning System (GPS) is a satellite system which gives...
The day GPS was fully operational – level 3
17-07-1995The Global Positioning System (GPS) is a satellite system that provides...
