A Grieving Parent's Greatest Fear

I now know how fragile life is. We don't all get to live long lives, experience all of life's milestones, and do all the things on our bucket list. I was well aware of child loss before December 2015, but I never dreamed that it would happen to me. I had two healthy children. We were decent parents with good jobs and lived in the 'burbs. What could go wrong?