Primary Image Source – Shutterstock/WikipediaCommons/DVIDSHUB
Secondary Image Source - EnvatoElements
Primary Background Footage Source - EnvatoElements
Secondary Background Footage Source - PreLinger archives/WikipediaCommons
Any other footage used listed under Creative Commons CC0, CC1, CC2, CC3 or CC4
https://creativecommons.org/publicdomain/zero/1.0/
https://creativecommons.org/licenses/by/1.0/
https://creativecommons.org/licenses/by/2.0/
https://creativecommons.org/licenses/by-sa/3.0/deed.en
https://creativecommons.org/licenses/by/4.0/

Thumbnail image credit: http://www.munichumbivilcas.gob.pe/ (Official Facebook Page)
Entry 5 credit: DOTr-CIAC (Public Domain)
Entry 4 credit: GYIRONG PORT (Public Domain)
Entry 3 credit: Jennifer Skilja (Licensed via ViralHog)
Entry 2 credit: Haitian National Palace (Public Domain)
Entry 1 credit: Library of Congress (Public Domain)
Several other segments licensed under Creative Commons

Other footage sources we may use;
- National Park Service Public Domain B-Roll
- NOAA
- NASA
- USGS
- DoD
- Creative Commons videos on YouTube if we can verify that the source is original

The appearance of U.S. Department of Defense (DoD) visual information does not imply or constitute DoD endorsement.
The appearance of ANY U.S. Government visual information does not imply or constitute endorsement by any government agency or affiliated agency.