In The usa, work produced by the federal government is not subject matter to copyright regulation, inserting it within the public domain. Having said that, the government may have and use copyrighted materials that were not originally designed by them. They designed from the 10th to your 16th century, https://martinjuclt.answerblogs.com/38658307/helping-the-others-realize-the-advantages-of-wotakoi-barnes-and-noble