A child is accidentally left in the back seat of a car and dies from hyperthermia: a parent’s worst nightmare, I imagine, and something many believe wouldn’t happen to them (itself a big part of the problem).
In an article debating the legal ramifications of such an accident, The Washington Post presents not only a heart-rending story, but offers some fascinating insights into risks and compromise; possible technical solutions; and neurological/psychological theories of why a child may unintentionally be left in a car.
via Schneier (which itself is a good overview if you don’t have time to read the full article.)