Hear conversations with astronauts, scientists and others who made NASA history, as we celebrate the agency's 50th anniversary.
Tracy Drain is a Systems Engineer for the Mars Reconnaissance Orbiter.
Alan Bean is an artist and former astronaut on Apollo VII.
Dr. Wendell Mendell is a Human Exploration Scientist.
Flora Caloway was a shuttle and Mir astronaut.
Lowery Duvall is a rocket scientist at NASA's Marshall Space Flight Center