"CIA director Petraeus resigns citing extramarital affair, will not testify on Benghazi attack in Libya"
Agony aunt conspiracy: "Did Paula Broadwell’s Cuckolded Husband Write a Letter to Chuck Klosterman in the The New York Times?" Unlikely as part of the wider conspiracy as the letter was written before the attack on Benghazi.
The 'fan fiction': "The Legend of David Petraeus" Petraeus is w-a-y too careful in building his carefully constructed legend to make this kind of mistake. By the way, the biography written by the alleged adulteress is called - wait for it - "All In".
Slate (my emphasis in red):
"It had long been rumored that something was going on between Petraeus and Broadwell. Her book, co-written with Vernon Loeb, is widely regarded as a valentine to the general. When she was embedded with him in Afghanistan, they went on frequent 5-mile runs together. But Petraeus went on 5-mile runs with many reporters, and few people who knew him took the rumors seriously. In his personal life, he’s always been seen as a straight shooter, a square. Few could have imagined that his end would come as the result of a morals scandal."
- the American use/misuse of radical Sunni Islamists to conduct proxy wars, and
- the foolish use of a 'private CIA' whose motives are exactly the opposite of the motives of the American government and who may have been involved in a conspiracy to allow the attack on Benghazi to succeed.