Here are some useful links for the most important crisis of the 20th century.
http://www.gwu.edu/~nsarchiv/nsa/cuba_mis_cri/
http://www.personal.psu.edu/staff/r/x/rxb297/CUBA/MAIN.HTML
http://library.thinkquest.org/11046/
Also try to watch the movie "Thirteen Days" by Metropolitan Films and New Line Cinema. Kevin Costner is pretty good.
"It shall be the policy of this nation, to regard any nuclear missile, launched from Cuba on any state in the western hemisphere as an attack by the Soviet Union on the United States, requiring a full retaliotary response upon the Soviet Union"
President John F Kennedy
October 22 1962
White House "Adress to the nation"