After the Kent State shootings, the Northwestern student body and faculty senate voted to suspend classes starting May 6 and join a nationwide strike in protest of the Vietnam war and violence at Kent State. The student protesters demanded that campus security be disarmed, the university endowment divest itself from "war stocks", and Northwestern's NROTC program be stripped of academic credit and its facilities turned into a childcare center. A May 8 rally at Dyche Stadium that attracted approximately 5,000 students and community members prompted Evanston city officials to request activation of the National Guard, but this potential conflict was avoided after the Guard were diverted away from the stadium. On May 13, a group of at least 33 students vandalized the NROTC's headquarters, but this was the only violent episode of the strike. The strike ended and campus re-opened for class on May 13, the longest span of time Northwestern has ever been closed.