Retired U.S. Army General David Petraeus pioneered America’s approach to counterinsurgency, led the surge in Iraq, served as Director of the CIA for a year, and was sentenced to two years probation for leaking classified information to his mistress. On Wednesday at the Aspen Ideas Festival, he was interviewed by my colleague, Jeffrey Goldberg, about subjects including efforts to stop Iran’s nuclear program; the civil war in Syria; ISIS and the threat it poses to the United States; and the Iraq War.