The phone book that led us to Assad's spy chief in hiding

BBC News follows the trail left by Hussam Luka, Assad's feared intelligence chief, after his sudden disappearance. A notebook found in his abandoned Damascus apartment, filled with contacts, becomes a key clue. The investigation uncovers his brutal past in Homs, including alleged involvement in a massacre, and leads to interviews with his former bodyguard and driver, ultimately suggesting he fled to Russia.