Who did Norah O'Donnell replace on the evening news?

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Tags

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2. #couric
3. #donnell
4. #david
5. #predecessors
6. #among
7. #tonight
8. #katie
9. #before
10. #diane
11. #sawyer
12. #anchor
13. #broadcast
14. #network
15. #first
16. #world
17. #evening
18. #chung
19. #connie