The flag of the North Atlantic Treaty Organization (NATO). Color is PMS 280, RGB #004990.
Current file:
Source:
Source file on Wikimedia Commons Flag of NATO.svg (January 2013)
Itself copied from the following sites:
http://althistory.wikia.com/
http://countries.wikia.com/
Resaved by me (User: 475847394d347339) with Inkscape because for some reason, the original SVG file can't be viewed directly in a web browser through Inkscape opens it just fine. (January 2013)
Used the aforementioned image to update this file (Nov 2015)
Color corrected to #004990 by User: Kwamikagami (Jul 2022)Previous file:

The official emblem of NATO at www.nato.int
Current file:
Found by 475847394d347339 in websites noted in the source section.Previous file:

Vectorization:  Mysid and uploaded to Flag of NATO.svg
Code cleaned up by Artem Karimov.