Heaven - CBN.com

Why are there people who say they died, went to Heaven and then came back? Does this mean they won't ever die again? How can I stop being afraid of dying? How can Heaven be perfect if all of our loved ones aren't there? Can people in Heaven look down and see those of us who are still on Earth? What will we look like in Heaven?
.. The Christian Broadcasting Network CBN http://www.cbn.com