Photographs

13 Photographs That Changed the World
http://www.neatorama.com/2007/01/02/13-photographs-that-changed-the-world/

American Museum of Photography
http://www.photographymuseum.com

Denver Public Library Photography Collection: Western History
http://history.denverlibrary.org/images/index.html

Famous Photos That Changed the World
http://www.cameranaked.com/

Flash! The Associated Press Covers the World
http://www.trumanlibrary.org/museum/flash/

FotoSearch: Stock Photography
http://www.fotosearch.com/

Getty Images
http://www.gettyimages.com/Creative/RightsManaged?esource=googUSA_Images_Archived&country=usa&kw=usa+historical_photograph

The History Place
http://www.historyplace.com/

H-Pac The Historical Photographic Archive
http://www.hpac.org.uk/

Library of Congress: American Memory
http://memory.loc.gov/ammem/ammemhome.html

NASA
http://www.nasa.gov/home/index.html

National Geographic: Photography
http://photography.nationalgeographic.com/

Picture History: The Primary Source for History Online
http://www.picturehistory.com/

Pictures of WWII
http://www.archives.gov/research/ww2/photos/

Think in Pictures
http://think-in-pictures.com/

World’s Famous Photos
http://www.worldsfamousphotos.com/