• 7 Technological innovations
• 5 Research
• 4 Airplanes
• 4 Space shuttles
• 3 Robotics
• 2 Artificial satellites
• 2 Design and construction
• 2 International Space Station
• 2 Training of
• 2 Voyager Project
• 2 Wind power
• 1 Aerodynamics
• 1 Aeronautics
• 1 Air
• 1 Airbus A320 (Jet transport)
• 1 Airplanes, Military
• 1 An-225 (Transport plane)
• 1 Cancer
• 1 Climate
• 1 Diagnosis
• 1 Discovery and exploration
• 1 Effect of volcanic eruptions on
• 1 Electric automobiles
• 1 Equipment and supplies
• 1 Fighter pilots

• 26 Switch International

• 26 English

• 2 Earth (Planet)
• 2 Japan
• 1 Alaska
• 1 Antarctica
• 1 Arctic regions
• 1 Thailand

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