Why Mubarak's downfall?

Why is Egyptian President Hosni Mubarak on his way out? And why now? Fouad Ajami explains (Hat Tip: William Daroff via Twitter). A deceased friend of mine, an army general of Mr. Mubarak's class and generation, spoke of the man with familiarity: He was a civil servant with the rank of president, he said of his fellow officer. Mr. Mubarak put the word out that he would serve two six-year terms