In 1966, Mbeki appealed to Oliver Tambo to allow any South African student who supported the ANC to be admitted into the movement's Youth and Students Section (YSS), irrespective of race. Tambo agreed and the YSS became the first non-racial arm of the ANC. In the same year, the ANC upheld its decision to exclude non-Africans from its National Executive meeting in its Morogoro conference. Mbeki busied himself with issues such as the protest against increases in student fees for foreign students, nuclear disarmament, and solidarity struggles with the peoples of Zimbabwe, Spain, Cyprus, Iraq, Iran and Vietnam, and the Portuguese-controlled territories. The YSS took an active role in the anti-Vietnam War movement, a campaign spearheaded by Mbeki. This led to Mbeki's friend, Essop Pahad, being elected onto the organising committee of the Vietnam Solidarity Campaign (VSC). The YSS became a major player in the anti-war marches. On 17 March 1968, Mbeki, took part in a massive anti-Vietnam demonstration outside the American embassy in London's Grosvenor Square and had his upper right molar tooth cracked when he was attacked by a policeman. Although he was arraigned and arrested for his part in the demonstration, he was not one of the 246 that were eventually charged. Mbeki completed his Master's degree at Sussex University in May 1968.