CNN: They hover above our heads, out of sight, zooming in and taking pictures.
They aren't interested in the latest celebrity wedding or covert military operation. And the images they take aren't going to make the front page of any magazine or website.
But maybe they should.
That's because the data collected by these powerful satellites have helped save countless lives by allowing meteorologists to warn people about dangerous storms -- sometimes a week before they strike -- with pinpoint accuracy....