Mr. Stern seemed to have forgotten that in his earlier , less contented days at CBS , Mr. Letterman made his boss a running joke in his monologue , becoming particularly acerbic about Mr. Moonves 's celebrity tour of Cuba in 2001 and meeting with Fidel Castro .
Fidel Castro
Cuba
/people/person/nationality
PERSON
Stern
ORGANIZATION
CBS
LOCATION
Cuba
PERSON
Fidel Castro