Watch CBSN Live

Could we really travel to Mars in the next 4 years?

SpaceX founder Elon Musk says it's doable to send astronauts to the moon within two years and to Mars in the next four years. How realistic is that? CBS News space consultant Bill Harwood joins CBSN from the Kennedy Space Center with a look at the challenges involved.
View CBS News In
CBS News App Open
Chrome Safari Continue