Using simple text, maps, and dramatic photographs, this book introduces readers to Mars, relying on the latest scientific findings from NASA and other space agencies. Features include Mars' physical measurements, its geology, atmosphere, gravity, orbit, and climate. Also covered are geographical wonders such as Valles Marineris (the largest canyon in the solar system) and Olympus Mons (the largest volcano), as well as major craters, icy poles, and...

An introduction to the United States Navy that provides information on its history, training, equipment, responsibilities in wartime and peacetime, and other related topics.

Presents information on the United States Air Force, tracing its history, discussing the training process, and exploring the aircraft used by the soldiers.

Introduces information about unmanned aerial vehicles used by the U.S. armed forces, including how they are used, some of the different models used, and their history. Introduces information about unmanned aerial vehicles, including the uses, models, and history.

In text and pictures, outlines developments in military weaponry over the last millennium