Little Johnny and his friend were always boasting of their parents' achievements to each other.

Friend: 'Have you ever heard of the Suez Canal?'

Little Johnny: 'Yes, I have'

Friend: 'Well, my father dug it.'

Little Johnny: 'That's nothing, have you ever heard of Dead Sea?'

Friend: 'Yes, I have.'

Little Johnny: 'Well, my father killed it.