Don Bateman's ground proximity warning system, which the FAA began requiring in the 1970s, was designed for use in what?

Which star had a No. 1 hit in 1975 with a cover of the Beatles' "Lucy in the Sky with Diamonds"? Complete the title of the 1975 sci-fi film starring Don Johnson: "___ and His Dog". Complete the title of the 1975 adventure film starring Sean Connery: "The ___ and the Lion". In 1975 which group took power in Cambodia, beginning a murderous four-year rule? In "Monty Python and the Holy Grail" (1975), which role did Graham Chapman play? Who had a 1975 No. 1 hit with "Have You Never Been Mellow"? At the end of which 1975 film does police chief Brody say "I used to hate the water... I can't imagine why"? In which 1975 hit does John Denver explain why he's grateful for simple rural life?