Astronauts conduct challenging spacewalk to fix experiment

Two Astronauts performed one of the most challenging spacewalks in NASA history Friday morning. It's the second in a series of high-stakes spacewalks to save a critical, $2 billion science experiment on the International Space Station. Janet Shamlian reports.

Astronauts conduct challenging spacewalk to fix experiment
Two Astronauts performed one of the most challenging spacewalks in NASA history Friday morning. It's the second in a series of high-stakes spacewalks to save a critical, $2 billion science experiment on the International Space Station. Janet Shamlian reports.