Across
1  With 4 Across and 9 Across, famous words on 7-20-69

4  See 1 Across

9  See 1 Across

13  Overnight techno dance party

15  Of the Vatican

16  Fresh

17  Already set sail

18  One-celled creature (alternative spelling)

19  Center of rotation

20  Surgical knife

22  Not sane

24  U - _____

26  Ex - _____

27  Lunar lander (abbr.)

30  Rejoicing

32  Rib joiners

37  Keats work

38  Apollo 11 name given to 27 Across

40  Setting for this puzzle's theme

41  Steinbrenner, for instance

43  Received

44  Many (prefix)

45  '70s rock phenomenon

46  Froth

48  Shocking fish?

49  Nab

52  Rewrite

53  Direction from old Bueker house to old Neff house

54  Distress call

56  Business course (abbr.)

58  Pitcher’s dream feat (2 words)

63  Every 60 minutes

67  Cupid, in Greece

68  Jeweled headdress

70  Jay North '60s TV vehicle

71  Popular frozen drink

72  Result

73  Irish town

74  Put a burden on

75  Drive away

76  Cozy room

1  Type of exam

2  Apollo 11 org.

3  Neck and neck

4  Omelet flipper

5  Yes, _____!

6  Copied

7  Tag

8  South American pack animals

9  Bridge

10  Send written message via cell phone

11  One of the Great Lakes

12  Combat-induced anxiety problem (abbr.)

14  Every

21  Quite willing

23  Phone number abbr.

25  No Nonsense competitor

27  Gazes

28  Aldrin

29  Elite intellectual society

31  Run away and marry

33  Flightless bird

34  Customary functions

35  Student's comments

36  Like an old woman

39  Chopin composition

42  Boston time zone

44  Ditto (2 wds.)

47  Collins

50  Omaha time zone

51  More popular

55  Famous European river

57  Floyd's "Comfortably _____"

58  Armstrong

59  Killer whale

60  Used a garden tool

61  "Understood"

62  Grating sound

64  Black Flag competitor

65  Harp

66  Story

69  Regret