Elon Musk says SpaceX-Tesla merger is 'a good idea'
Elon Musk said Tuesday that a merger of his two companies SpaceX and Tesla would be "a good idea" and that they had formed special committees to discuss a union, sending shares of the space and technology company up 8% in extended trading. Global Aerospace & Defense Editor Joe Brock breaks down an idea that could create one of the most valuable companies in the world, worth about $3.5 trillion.

