Lindbergh is fixed. As for Cooper, nobody is even sure of his name, much less exactly what state he parachuted over. It was somewhere between Oregon and Washington. I just chose Oregon because it was shorter and I didn't want the clue boxes to be too big :-)
Famous silent film star seems pretty broad as a clue. I tried W.C. Fields, Mary Pickford, Theda Bara, Douglas Fairbanks, Buster Keaton, Rudolph Valentino, Lionel Barrymore...I'm surprised that so many others got it correct.