After being launched in 2006 -- and traveling more than 3 billion miles -- the New Horizons spacecraft is nearing Pluto with the goal of capturing close-up images of the dwarf planet
After being launched in 2006 -- and traveling more than 3 billion miles -- the New Horizons spacecraft is nearing Pluto with the goal of capturing close-up images of the dwarf planet. As CBS News correspondent Chip Reid explains, it could be the last great space exploration mission of our time.
