"No one has any intention of erecting a wall," said Walter Ulbricht, head of the SED and Chairman of the State Council of the GDR, as recently as June 15, 1961. Yet two months later, construction of the Berlin Wall began, sealing the division between East and West Germany. The SED leadership sought to halt the mass exodus of people to West Berlin and the Federal Republic of Germany, which was hampering the GDR's economy and destabilizing the state. The approximately 155-kilometer-long barrier cut Berlin in two for more than 28 years, separating many families and isolating the western part of the city from its surrounding areas. According to the Berlin Wall Foundation, at least 140 people were killed at the Wall or died in connection with the GDR’s border regime during this period. In addition, at least 251 travelers died during or after inspections at Berlin border crossings.