Images

I have found Wikimedia commons the best site for public domain images. Very few are copyrighted, and they explain the issues of copyright pretty well. When you search for images try looking for a category. To do this type in the search box. Start by typing category followed by a colon (Vietnam War:). After the colon type in a keyword. You will be given a large list of items within this category, as well as many subcategories. A cool trick is to type Category: and then follow it with a year. Give it a try!