WATCH: Mothers honor Srebrenica victims ahead of U.N. genocide vote

They were joined by UK Minister for Europe Nusrat Ghani and British Ambassador Julian Reilly. The visit preceded a U.N. vote on establishing an annual day to commemorate the genocide. The resolution, backed by Germany and Rwanda, faces opposition from Bosnian Serb President Milorad Dodik and Serbian President Aleksandar Vucic, who deny the genocide despite U.N. court rulings.