3 Year Old Shoots, Kills Father

From the Houston Chronicle: Police say a 3-year-old boy accidentally shot and killed his father after finding the man's loaded handgun in a southern Indiana home.
Indiana State Police Sgt. Jerry Goodin says the 33-year-old Martinsville man had brought his gun with him Friday to a home he was remodeling in Salem, about 25 miles northwest of Louisville, Ky.
Goodin says the man, his wife, their three children and a juvenile relative were at the home when the 3-year-old boy apparently found the gun and it accidentally discharged, fatally wounding the man. No one else was injured. http://www.chron.com/news/article/Indiana-police-say-boy-3-fatally-shot-father-3707253.php
I don't own a gun, but if I did and I also had a 3 year old child, I would make damn sure that the gun is out of sight out of mind for the toddler.
Yes, it was an accident, but it was a totally preventable accident.  The only good thing is that this should not affect the toddler as her probably will not remember the incident in the long term