Berlin Wall and to pass it on to the coming generations as a reminder to stand up for freedom and democracy to ensure that such injustice may never happen again," entreated Mayor Wowereit. "It has been shown once again: Freedom is invincible at the end. No wall can permanently withstand the desire for freedom", proclaimed President Wulff." Notes Bibliography Further reading Berlin Wall The Berlin Wall (, ) was a guarded concrete barrier that physically and ideologically divided Berlin from 1961 to 1989. Constructed by the German Democratic Republic (GDR, East Germany), starting on 13 August 1961, the Wall cut off (by
Berlin Wall shut down access to the Twitter Wall after masses of Chinese users began using it to protest the Great Firewall of China. In the United States, the German Embassy coordinated a public diplomacy campaign with the motto "Freedom Without Walls", to commemorate the 20th anniversary of the fall of the Berlin Wall. The campaign was focused on promoting awareness of the fall of the Berlin Wall among current college students. Students at over 30 universities participated in "Freedom Without Walls" events in late 2009. First place winner of the Freedom Without Walls Speaking Contest Robert Cannon received a free trip