"President John F. Kennedy's assassination on November 22, 1963 was preceded by a total solar eclipse earlier that year." -Messenger ECP: Saint Germain Prophecy, 2, 1990, p. 65
So now we have the natal chart of JFK for Brookline, MA at 3 p.m. of 5-29-1917; also the natal chart for "Sam" Giancana of 6-15-1908 in Illinois; also that the solar eclipse of 7-20-1963 was at 95% over Boston.
First, JFK's natal chart: 24 degrees Cancer MH at 45 degree angle to Sun at 8 Gemini. No other Sun aspects. So the midheaven aspect is crucial. After 46 years (hence 1963) JFK's natal sun progressed to that point--showdown. Big showdown.
Second, Sam Giancana's natal chart--This guy was really rough, fierce, uncompromising according to his own sense of values: Sun, Pluto conjunct at 24 Gem.; Neptune, Mars, Mercury between 13-16 Cancer square to Saturn at 9 Aries and opposite Uranus at 16 Cap. Thus both SG and JFK had in common the Gemini/Cancer dynamic, but SG's was stronger by far. (Then of course JFK pissed off a lot of the East Coast Establishment, not too small a factor.)
Finally, by progression rate of 1 degree/year JFK's natal descendant advanced, so that in 46.5 years the 21 degrees Aries of his natal descendant reached 7.5 degrees Gemini, thus hiting his own natal Sun. A fast life. -R, Ashland, OR