@Berty McJock,
The notion that Bush invaded Iraq to right his father's failure, is foolish.
First of all, Bush Sr. doesn't think he failed. Neither do I. He didn't need his son to get the bastard he missed. He could have gotten him, he chose not to
Secondly there was a very substantive reason for invading Iraq that was well beyond a son finishing a job for his father. Reasonable minds can disagree whether of not that reason was legitimate or wise, but it wasn't so silly as you and other suggest. It had little or nothing to do with family vanity.
The difference between Bush the Elder and Bush the Younger had very little to do with whether or not Saddam needed to be taken down, it had to do with the difference in a foreign policy based on realism vs one based on idealism.
After 9/11 W was convinced big and bold actions on the world stage were necessary. Before 9/11, he was a realist, just like his Dad.