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Creative Commons License: creativecommons.org/licenses/by/3.0/legalcode
Original Videos: vimeo.com/nicholaskurtz/videos; wpclipart.com/world_history/the_hand_of_man/wright_brothers_first_flight_1903.png; vimeo.com/124244671; vimeo.com/104818804; vimeo.com/104818804; vimeo.com/121699047; vimeo.com/107477914; vimeo.com/107477914; vimeo.com/59640300; vimeo.com/61242920; vimeo.com/123841760; youtube.com/watch?v=kdSMCMyASXE; youtube.com/watch?v=xk7_eb1hr9Y; youtube.com/watch?v=nBIBbMt-psY