Last Week Tonight examines Pete Hegseth's record as defense secretary, from kettlebell swings mocked by fitness commentators and the Signalgate fiasco to the purge of senior officers and the killing of two survivors in a boat strike off Venezuela that former military lawyers say was a war crime or murder. John Oliver, arguing the Iran war has been an utter fiasco that Hegseth has misrepresented to the president, says Hegseth should be impeached, removed, and barred from future federal office.