From Wikipedia:Copyrights:
"Government photographs
Works produced by employees of the United States federal government in
the scope of their employment are public domain by statute. However,
note that, despite popular misconception, the US Federal Government
can own copyrights that are assigned to it by others. As a general
rule photographs on .mil and .gov sites are public domain. However
there are some notable exceptions. Check the privacy and security
notice of the website. It should also be noted that governments
outside the US often do claim copyright over works produced by their
employees (for example, Crown Copyright in the United Kingdom). Also,
most state governments in the United States do not place their work
into the public domain and do in fact own the copyright to their work.
Please be careful to check ownership information before copying."
From Template:PD-US
"This image is in the
public domain in the United States and possibly
other jurisdictions. See Copyright."
I think it's a bit vague but don't dare "fix" it because i might be
"un-fixing" something, what it reads like to me is that things marked
as {{PD-US}} are in the public domain in the United States but might
not be in the public domain in other countries. Is this the desired
message or does it mean to say that things marked as {{PD-US}} are
things put into the public domain by the US Government?