GOP Congressional Leaders Call For "Measured Response" Against Iran After U.S. Drone Shot Down In Disputed Location; U.S. Insists Drone Was In International Airspace; U.S. Releases Coordinates Of Drone Flight; Insists It Was In International Airspace; Pres. Trump On Response To Iran: "You"ll Find Out"; Pres. Trump: "Probably Iran made A Mistake"; Source: Joe Biden Calls Sen. Booker After CNN Interview, Booker Won't Apologize For Criticism Of Former V.P.; Biden, Booker Speak On Phone After Backlash Over Biden Citing Segregationists; Hope Hicks Transcripts Released; Hope Hicks Tells Judiciary Committee She "Lived" Mueller Report; A Few Words About Anderson's Mother
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Anderson Cooper 360