For almost 40 years, military training has been effectively absent from the nation's most selective civilian universities. During the Vietnam protest movement, schools such as Brown, Columbia, Harvard, and Yale banned on-campus ROTC programs. This practice continued under evolving rationales, the most recent being Don't Ask, Don't Tell (DADT). In March of 2006, the Supreme Court ruled unanimously that these schools must allow the military full access. The Naval Education and Training Command (NETC) has yet to take advantage of this opportunity.