LICENSE

NO LICENSE
This is a product of the U.S Government
Public Domain

United States government creative works, including writing, images,
and computer code, are usually prepared by officers or employees of
the United States government as part of their official duties. A
government work is generally not subject to copyright in the United
States and there is generally no copyright restriction on
reproduction, derivative works, distribution, performance, or display
of a government work. Unless the work falls under an exception, anyone
may, without restriction under U.S. copyright laws:

    Reproduce the work in print or digital form
    Create derivative works
    Perform the work publicly
    Display the work
    Distribute copies or digitally transfer the work to the public by
     sale or other transfer of ownership, or by rental, lease, or
     lending

See also:
  http://www.usa.gov/government-works