21st Century Skills Library: Aliens Amon Area 51 and Other Top Secret Science, (Paperback)

The Pentagon is the headquarters of the United States Department of Defense, the head of our military operations. It's come under fire for keeping mysterious secrets under wraps--including possible proof of alien life. Find out what other out-of-this-world information the government has possibly kept hidden. Includes 21st Century Skills and Content, sidebars, activity, table of contents, index, and glossary.