Actually when they make it to shore and are caught they are held by INS. Every attempt is made to return them to the country they came from, but Cuba never agrees. Since they can't be held indefinitely, after a certain period (I think 2 years) they are released in the US and expected to obtain citizenship. However, a large amount of them do not, and it would just kill you to see what deplorable conditions some of them live in here in the US.