Such displays of protest became more violent as the 1960s progressed. In February 1966 a group of around 500-1000 students gathered in front of the building for a protest against the Vietnam War. Although sanctioned by the police, they were forced to step in when students began throwing eggs at the building and the American flag. Whilst relatively tame when compared with later actions, this incident provoked a strong pro-American reaction from certain parts of the city. The newspaper "Die Welt" described the incident as "embarrassing", and the head of Free University of Berlin offered his support. The Student Council at Technical University of Berlin also sympathized with the United States and called for the creation of a scholarship that would be granted to a member of the American Peace Corps. In reaction to this outpouring of support in favor of the institution, the police launched a search for the people responsible for throwing the eggs. Two days after the demonstration the CDU, the Young Union, and the Circle of Christian-Democratic Students organized a counter-demonstration that took place in front of the Amerika Haus. Some hecklers were removed during the course of this half-hour gathering and were forcibly taken to the nearby train station Zoologischer Garten, where they were told they could get a ticket and go to the East if they were so strongly against American politics. A few weeks later the Amerika Haus Berlin celebrated its 20th anniversary with a special ceremony, during which the incidents of the previous weeks were further discussed. The support the Berliners gave in response to the egg throwing incident clearly showed that the majority of Berliners thought positively of the institution. Even Mayor Willy Brandt, a staunch supporter of freedom of speech, spoke out against the actions of the students and offered his support. Despite this outpouring of support, further demonstrations against American policy towards Vietnam took place. On December 20, 1967, the newly elected Mayor Klaus Schütz spoke out against the demonstrations during a lecture at the Free University. Some students who were present at the speech were angered by Mr. Schütz's words and his pro-Vietnam stance. Many of them left the event, walked to the Greek military mission and then on to the Amerika Haus where they broke windows by throwing stones and snowballs. The police were called in to stop the demonstration and save the building from further destruction. The fragmentation of the student movement in the late 1960s led to a new phase in protests against the Amerika Haus that included further demonstrations carried out by militant and anarchist groups.