On 21 October 2003 Wowereit became one of four members representing the "Land" of Berlin in the supervisory board of the project to build the new Berlin Brandenburg Airport. In 2006, he was elected chairman of the board. However, on 7 January 2013, Wowereit relinquished his chairmanship after the continuing delay of the airport's opening date. The prime minister of the "Land" of Brandenburg, Matthias Platzeck was appointed as his successor. Wowereit survived a vote of no confidence brought against him in the Berlin House of Representatives on 12 January. When Platzeck gave up his political offices for health reasons in July 2013, Wowereit was eventually appointed chairman again, despite much criticism. Critics have accused Wowereit of being responsible for the various delays and cost overruns of the airport project. He has been accused of being blind to looming problems, and reacting angrily to unfavorable reports. Also, he is said to have filled the board with political friends rather than professionals.