Mount Holyoke College
U.s. Dept. Of State: Review of Operation Mongoose
Here are the plans for Operation Mongoose, the goal of which was the overthrow of Fidel Castro and the institution of a government friendly to the United States. A very interesting document outlining how this operation could be carried out.
Library of Congress
Loc: Cold War: Cuban Missile Crisis
This brief Library of Congress site has info on the Russian's role in the Cuban Missile Crisis.
ibiblio
Ibiblio: Cuban Missile Crisis
Ibiblio.org provides a brief background of the crisis and links to letters (originals and translations) exchanged between JFK and Khrushchev.