A subsidiary company of Degussa, Degesch, had even produced the Zyklon B gas used to poison people in the gas chambers. At first these articles did not receive much attention, until the board of trustees managing the construction discussed this situation on 23 October and, after turbulent and controversial discussions, decided to stop construction immediately until a decision was made. Primarily it was representatives of the Jewish community who had called for an end to Degussa's involvement, while the politicians on the board, including Wolfgang Thierse, did not want to stop construction and incur further expense. They also said it would be impossible to exclude all German companies involved in the Nazi crimes, because—as Thierse put it—"the past intrudes into our society". Lea Rosh, who also advocated excluding Degussa, replied that "Zyklon B is obviously the limit." In the discussions that followed, several facts emerged. For one, it transpired that it was not by coincidence that the involvement of Degussa had been publicized in Switzerland, because another company that had bid to produce the anti-graffiti substance was located there. Further, the foundation managing the construction, as well as Lea Rosh, had known about Degussa's involvement for at least a year but had not done anything to stop it. Rosh then claimed she had not known about the connections between Degussa and Degesch. It also transpired that another Degussa subsidiary, Woermann Bauchemie GmbH, had already poured the foundation for the stelae. A problem with excluding Degussa from the project was that many of the stelae had already been covered with Degussa's product. These would have to be destroyed if another company were to be used instead. The resulting cost would be about €2.34 million. In the course of the discussions about what to do, which lasted until 13 November, most of the Jewish organizations including the Central Council of Jews in Germany spoke out against working with Degussa, while the architect Peter Eisenman, for one, supported it. On 13 November, the decision was made to continue working with the company, and was subsequently heavily criticized. German-Jewish journalist, author, and TV personality Henryk M. Broder said that "the Jews don't need this memorial, and they are not prepared to declare a pig sty kosher." On 15 December 2004, the memorial was finished. It was dedicated on 10 May 2005, as part of the celebration of the 60th anniversary of V-E Day and opened to the public two days later.