A True Leader of Men

A son asked his father, 'Dad, will you take part in a marathon with me?'
The father who, despite having a heart condition, said 'yes.' They went on to complete the marathon together.

Father and son went on to join other marathons..., the father always saying 'yes' to his son's request of going through the race together.

One day, the son asked his father, 'Dad, let's join the Ironman together.'

To which, his father also said 'yes'.