On the Cover: Ten years ago <i>Viking 1</i> reached Mars, and the doughty little spacecraft began to turn the mysterious Red Planet into a familiar place to scientists and television viewers back on Earth. Here, the spacecraft looks across the cratered surface to the cloud-streaked horizon. Argyre Planitia, the large, smooth basin in the lower left, is probably the remnant of an asteroid impact.
4 NASA, the Presidency and International Leadership: Bruce C. Murray looks at what lies ahead for American manned space flight.
6 There Is Life on Mars, and It Is Us! Ray Bradbury discusses testifying before the National Commission on Space.
8 Let's Go to Mars Together: Carl Sagan makes the case for why exploring Mars should be a multi-national cooperative effort.
10 Viking: Reflections After Ten Years: James S. Martin, Jr. recounts the excitement and peril of the twin orbiter/lander Viking mission to Mars.
15 A Millennium Project: Mars 2000: Harrison Schmitt presents a new project for The Planetary Society.
18 The Mars One Mission: Kerry Mark Joëls describes a human Mars mission concept.
3 Mars: Realizing the Dream Commentary by Carl Sagan.
20 News & Reviews Beyond the fuzzball; spacecraft studies continue.
21 Society Notes Library outreach; New Millennium Committee expands.