A kingdom lost over a nail

There is a story I heard years ago; a nail in the shoe of a horse was loose but the person in charge neglected to fix it. One day invaders entered the country, and a soldier was ordered to gallop to the country's capital and alert the army. The soldier mounted the horse and started galloping but then the nail broke, the horseshoe moved, the horse could not gallop anymore, and the alarm did not reach the capital in time. Thus, goes the story of a kingdom lost over a nail. I thought of this story as I observe developments in Greece after the recent train tragedy.

I am too far away to follow all the developments, but it seems there is plenty of blame to go around. There is a judicial inquiry going on and some individuals will be prosecuted. There will also be political consequences; the minister of transport resigned, and the governing party will be facing the voters in a few...