Allison Hanes: Don't think the unthinkable can't happen to you

The unthinkable has happened twice already this summer.
First, a two-year-old boy in Burlington, Ont., was discovered dead when his father returned to his parked vehicle after work on a warm day in May.
It happened again last Friday in Montreal. On the eve of the holiday weekend, a dad showed up at a daycare to pick up his six-month-old. When informed the baby had never been dropped off, he ran to his car to find the child dead inside still strapped in the carseat.
By all appearances, these case