Discusses all of the major wars in which the United States has participated beginning with the American Revolution and concluding with the Gulf War of 1991.
Describes such dangerous jobs as smoke jumper, undercover cop, test pilot, and epidemiologist and presents brief interviews with people who hold these risky jobs.
Find out how people move across land, on water, in the air, and in space now--in times past, and in the future all over the world. Learn how boats float, how submarines sink, how airplanes and helicopters fly, and much more.
