At his Amazon bio states and his writings at Sic Semper Tyrannis prove,

W. Patrick Lang is a retired high level military intelligence officer, a life long student of the American Civil War and the Lincoln assassination. He is a widely published author and military consultant. His broad experience of combat and of the espionage world uniquely combine to give him special insight into the realities of such events across time.

David Ignatius wrote the article titled, Osama bin Laden is Winning, Even in Death for the Washington Post.

Patrick Lang provides commentary:

Truer words were never..., etc. Islamic revivalism (especially in Sunni Islam) is a cyclical phenomenon. Islam sees itself as a universal truth that should become a way of life for all. All else is tactics.

The fervor for an active pursuit of God's Kingdom on earth ebbs and flows with the tides of world history. Every hundred tears or so since the failure of the Ottomans before Vienna a new generation has arisen willing to try the issue at arms with the West, Islam's principal rival in the contest for the souls and obedience of men. In our days, AQ became the standard bearer for this effort. AQ has largely been defeated but that does not mean that Sunni Islamic revivalism has been defeated.

...

In Egypt, a great "political" crash is coming when the generals have to face the fact that the various Islamist parties are merely a continuation of AQ's jihad by other means. If the MB, Nur or some combination of Islamist groups achieve effective control of Egypt, the generals are finished as a group. There will be other generals in that future but they will be Islamist generals.