Don't know much about history

Whenever my kids ask for help with their homework, the first part of this song is my response.Let's go to the videotape.Perhaps 'don't know much about history' is Barack Obama's problem too. (Sam Cooke kind of looks like Obama, doesn't he?) This is Mort Zuckerman in the Wall Street Journal (Hat Tip: Memeorandum), available here for those of you who don't have Journal subscriptions.Jerusalem is