Denzel Washington on 'waterboarding' (VIDEO)

Denzel Washington has said he went through the controversial interrogation technique of "waterboarding" in preparation for his latest film role.

The Hollywood star was talking to the BBC's Andrew Marr about his new movie Safe House.

The full interview can be seen on The Andrew Marr Show, 0900GMT, Sunday 19 February, on BBC One, and for seven days afterwards on the BBC iPlayer.