Dr Efraim Zuroff, director of the Simon Wiesenthal Center in Israel,
has dedicated his life to tracking down and prosecuting those
responsible for the atrocities of World War II.
Many war crimes suspects are elderly and infirm and so are the witnesses. Memories
are fading, but Mr Zuroff says he will not give up, "not until the last Nazi war criminal is prosecuted."
He told HARDtalk the task of bringing Nazi
criminals to justice is often frustrating but he believes it
is an obligation to the victims of the Holocaust to keep trying.
You can watch the full interview on the BBC
News Channel on Wednesday 17th February 2010 at 04.30 and 23.30
And on BBC World News at 04:30, 09:30, 15:30,