IF ................................

you could go back into the past and change just ONE thing, what would it be and why?

My father and brother became estranged in 1972, never to utter a word to each other ever since. My brother claims not to have a father, my father has no son. Mom died without experiencing the joy in her heart that father and son were re-united. In hindsight, if I was only given one wish, I would do whatever was necessary to attempt to prevent the injury, or try to fix it while it was still young and tender.

What would you do, if you could?