Holocaust Remembrance Week starts today with a rare acknowledgement, Palestinian President Mahmoud Abbas who called the Holocaust the 'ugliest crime' of modern history.

The United States Holocaust Memorial Museum in Washington helps raise awareness and further understanding of what took place years ago.

Museum director Sara Bloomfield explains how Nazi Germany changed leading up to the Holocaust: 'It was a very civilized, advanced country. It was a young democracy, but it was a democracy. And yet, it descended not only into social collapse, but world war and eventually, mass murder.' 

Approximately six million Jews were murdered by the Nazis who came to power in Germany in 1933.

Holocaust remembrance week is April 27th to May 4th.