An SVG recreation of the flag of the United States Secret Service (USSS), based on actual photographs of the flag.  It is a horizontal flag bicolor with equal bands of yellow and blue, and with a white equilateral triangle at the hoist; in the center of the triangle is a United States Secret Service badge dating back from the early-to-mid 1870s. The flag dates back from when the USSS was a part of the U.S. Department of the Treasury. The flag itself is in the public domain as a work of the U.S. federal government, and the SVG has been released into the public domain by its author, FOX 52. Photographs of the actual flag can be found here and here.
Own work using: http://www.secretservice.gov/

U.S. Secret Service official website
U.S. Secret Service media center
FOX 52 (SVG)United States Secret Service