The revelation about General David Petraeus' extramarital affair has led to a slew of questions about who in Washington knew what and the timing of the 60-year-old's resignation.
The retired four-star general stepped down from his post as CIA director last Friday after admitting he had a relationship with his 40-year-old biographer Paula Broadwell.
It emerged over the weekend that the FBI only uncovered the affair after agents began investigating "harassing" emails allegedly sent by Ms Broadwell to Jill Kelley, a Petraeus family friend from the general's time at MacDill Air Force Base in Florida.
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