I have two kids....a son 10 and 4yr-old daughter. My daughter is a bit too young and we've kept the news off when she's been in the room.  My son has asked a few questions....some tougher than others.

I would NEVER tell you how to parent, or what to say. But my wife and I found these articles helpful.

One from the NYU Child Study Center and this one from Akron Childrens Hospital.