Nov. 12, 2004 Sonja Alexander Headquarters, Washington (Phone: 202/358-1761) MEDIA ADVISORY: M04-183 NASA'S HISTORY SERIES REVIEWS EXPLORATION CHALLENGES NASA's online history series "Why We Explore" continues, Monday on the NASA Web portal. NASA's Chief Historian Steven Dick reviews the challenges to reinvigorate the exploratory nature of Americans that has served the country so well throughout history. Why We Explore, other news and multimedia features about the Vision for Space exploration are available on the Web at: http://www.nasa.gov/newvision A multimedia feature about NASA's history is available on the Web at: http://www.nasa.gov/externalflash/NASA45th For more about NASA's history on the Web, visit the agency's History Office at: http://history.nasa.gov/ -end-