A few tunes for the 50th anniversary of the (first) Kennedy assassination:
Crucifixion by Phil Ochs. Phil sang this for Bobby once, and supposedly by the end they were both bawling. It’s one of my favorite songs ever; goes very well on the dulcimer, too.
Beethoven the funeral march from the Eroica Symphony. According to NPR this afternoon, the Boston Symphony had regular Friday afternoon concerts, and they found out about the assassination during the show. They changed the program, and after announcing it, they played this piece. It’s really a spectacular tearjerker. (Too bad most of what Beethoven wrote was (allegedly) in major keys. 
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