FILE - In this July 7, 1987, file photo, Lt. Col. Oliver North is sworn in before the Iran Contra Committee prior to his testimony in Washington. Washington knows how to do big hearings. Dramatic congressional hearings are something of a Washington art form, a rite of democracy carefully crafted for the cameras. Suspense is building as fired FBI Director James Comey prepares to claim the microphone June 8, 2017, in an austere, modern hearing room of the Hart Senate Office Building. (AP Photo/Lana Harris, File)
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