NASA is gearing up this week for a mission to launch a SpaceX Falcon 9 rocket into a near-Earth asteroid in an attempt to move it slightly off its projected course. Thomas Zurbuchen, an associate administrator for the NASA Science Mission Directorate, joined Cheddar's "Opening Bell" to provide some additional details about the Double Asteroid Redirection Test (DART) and explained why it is necessary as a means to protect Earth.