GPO

NASA SP-2011-4234. This book presents the history of planetary protection by tracing the responses to the concerns on NASA's missions to the Moon, Mars, Venus, Jupiter, Saturn, and many smaller bodies of our solar system. The book relates the extensive efforts put forth by NASA to plan operations and prepare space vehicles that return exemplary science without contaminating the biospheres of other worlds or our own. To protect irreplaceable environments, NASA has committed to conducting space exploration in a manner that is protective of the bodies visited, as well as of our own planet.

CMH Pub 30-24. Army Historical Series. Freedom by the Sword tells the story of the Colored Troops recruitment, organization, and service. The broad focus is on every theater of the Civil War and its concentration on what black soldiers actually contributed to Union victory. Tells what they actually did as soldiers during the war. Examines the Colored Troops' formation, training, and operations during the entire span of their service, and in every theater of the war in which they served. Underscores the unique nature of their contributions bothto Union victory and to their own liberation.

CMH 30-22. Issued with a laminated hard cover that has an illustration of soldiers standing in front of American flags. Presents American military history from 1917 to the present. Includes expanded sections to include an analysis of the wars in Afghanistan and Iraq up to January 2009.