"Friday, January 6, 2017: On that day, as always, John Brennan's alarm clock was set to go off at 4:15 a.m. But nothing else about that day would be routine. That day marked his first and only security briefing with President-elect Donald Trump. And it was also the day John Brennan said his final farewell to Owen Brennan, his father, the man who had taught him the lessons of goodness, integrity, and honor that had shaped the course of an unparalleled...