Ez csak a kulso forrasbol szarmazo muvekre igaz. A szovetsegi torveny szerint a tobbi tartalom alapertelmezetten nem all copyright alatt.
"Pursuant to federal law, government-produced materials appearing on this site are not copyright protected. The United States Government may receive and hold copyrights transferred to it by assignment, bequest, or otherwise. Except where otherwise noted, third-party content on this site is licensed under a Creative Commons Attribution 3.0 License. "
Ami az igazan jo, hogy pl. emiatt a NASA kepeit is fel lehet hasznalni: "NASA still images; audio files; video; and computer files used in the rendition of 3-dimensional models, such as texture maps and polygon data in any format, generally are not copyrighted. You may use NASA imagery, video, audio, and data files used for the rendition of 3-dimensional models for educational or informational purposes, including photo collections, textbooks, public exhibits, computer graphical simulations and Internet Web pages. This general permission extends to personal Web pages."