The United States and Israel on Saturday launched a sweeping attack on Iran, raising the risk of a wider regional war. In announcing the strikes, President Trump pledged to crush Iran's military forces, to dismantle its nuclear program, and ultimately to force a change in its leadership by appealing to the Iranian people to "take over your government." To understand how Iran's revolutionary powers came to be and help explain the current-day conflict, 60 Minutes is revisiting its decades-long coverage of Iran: