Excellent! This is the most complete image search site on the web. Check usage terms for each site.
This is an excellent site general interest images. Each image has copyright information, image size, type, etc. The "advanced search" function provides ways to eliminate unwanted topics and narrow the search.
There are many general use images available on this site. The terms of use for clip art for web sites are provided.
There are several sections to this site, many of which are in the public domain, such as NASA TV.
The images in this section are not copyrighted. See the "copyright" section for terms and conditions of use.
This section of the site has photo, video, audio, and arts galleries. The material is in the public domain unless otherwise noted on each section. The site states "Most NASA images are in the public domain." See the conditions for using the NASA emblem, as well.
NARA's holdings include presidential materials, congressional materials, textual records, electronic records, film, video, and sound records, photographs, government documents and selected topics, such as the Holocaust, Watergate, and more.
This site has many links organized by themes. Included are backgrounds, borders, images, icons, and image editors and tools.