A poster reading "1 of the 21,662 houses where Jews lived who were murdered in World War II" is seen on a window of a house at Merwedeplein in Amsterdam, Netherlands, Wednesday, May 4, 2011. A project... more 
A poster reading "1 of the 21,662 houses where Jews lived who were murdered in World War II" is seen on a window of a house at Merwedeplein in Amsterdam, Netherlands, Wednesday, May 4, 2011. A project called "Jewish Houses," part of Wednesday's commemorations of World War II victims, encouraged Amsterdam residents to put up posters marking the 21,662 houses where Jews are known to have lived before the community was systematically sent to die in Nazi concentration camps. (AP Photos/ Evert Elzinga) less 
1 / 26
Associated Press
Wed, May 4, 2011 10:50 AM EDT