Guest: Harrison Schmitt, Apollo 17 astronaut.

The last man to walk on the moon did so in 1972. Harrison Schmitt is to date the only civilian scientist to the moon, a geologist who continues to be a strong advocate for the exploration and settlement of space. Today on Focus, he'll talk about what it's like to stand on the lunar surface, and about what lies ahead for humans in space.

Guest: Robert Zubrin.

Will astronauts ever return to the moon? Will they venture beyond our own system to other planets? This morning on Focus, we'll discuss Space Shuttle design, interplanetary travel, and Mars missions with former NASA engineer Robert Zubrin, worked on the design of advanced space transportation and propulsion as well as the development of strategies for the exploration of Mars during his time with the space agency.

A discussion about the future of America's space program with expert John M. Logsdon, Director of the Space Policy Institute, George Washington University. 

Guest: Andrew Mishkin.

Sojourner's diminutive size didn't stop it from captivating millions of people when it beamed back the first-ever photos from the red terrain of Mars. But the Pathfinder mission's story goes far back beyond that first contact. NASA engineer Andrew Mishkin joins us today on Focus to give us the details on the massive effort made by the world's best minds to land an artificial intelligence on the surface of Mars.