The failure of the invasion of Cuba in April 1961 by 1500 CIA-trained anti-Castro expatriates is generally attributed to President Kennedy's loss of nerve at the critical moment when he cancelled the air strikes which were supposed to incapacitate Castro's air force. As a result, more than a hundred men were killed, the rest surrendered, and the Cuban exiles in America never forgave Kennedy for this "betrayal." The above statement is TRUE. I hope that this is the answer that you were looking for and it has helped you.