Castro Ransom - Tractors For Prisoners The announcement of Castro's ransom demands- 500 tractors for the return of 1200 prisoners captured in the ill-starred invasion is made at the Havana agricultural fair where samples of Russian bloc tractors that were never delivered are displayed. Castro at podium. (no audio of speech) Meanwhile, 10 of the prisoners arrive in the United States to represent fellow prisoners in a negotiations with a private committee that will attempt to raise funds to purchase the tractors. Men in uniform, military.