As part of changes under Sumner M. Redstone , Viacom 's chairman and chief executive , Mel Karmazin departed as Viacom 's president in June , and Leslie Moonves and Tom Freston were named co-presidents .
Leslie Moonves
Viacom
/business/person/company
Leslie Moonves
Viacom
/business/person/company
ORGANIZATION
Viacom
PERSON
Mel Karmazin
ORGANIZATION
Viacom
PERSON
Leslie Moonves
PERSON
Tom Freston