Marty Baron’s tenure as executive editor of The Washington Post coincided with Amazon founder Jeff Bezos buying the paper, the presidency of Donald J. Trump, a national reckoning around race and digital disruption in the media. On Friday, Oct. 6 at 12:00 p.m. ET, Baron joins editor and author Tina Brown to discuss his new book, “Collision of Power,” about leading a newsroom at a time of change and disruption.