nearly half a million items, and the Mary Lea Shane Archives. The Shane Archives contains an extensive collection of photographs, letters, and other documents related to Lick Observatory dating back to 1870. A new addition to the library opened on March 31, 2008, including a "cyber study" room and a Global Village café. The original library reopened on June 22, 2011 after seismic upgrades and other renovations. In total, the University Libraries contain over 2.4 million volumes. Grateful Dead archive In 2008, UCSC agreed to house the Grateful Dead archives at the McHenry Library. Exhibits of Grateful Dead Archive materials are on display in the Brittingham Family Foundation's Dead Central Gallery on the 2nd Floor of McHenry Library. The Dead Central exhibit space is open during all library business hours. UCSC plans to devote an entire room at the library, to be called "Dead Central," to display the collection and encourage research. UCSC beat out petitions from Stanford and UC Berkeley to house the archives. Grateful Dead guitarist Bob Weir said that UCSC is "a seat of neo-Bohemian culture that we're a facet of. There could not have been a cozier place for this collection to land." The archive became open to the public July 29, 2012. Student life Most undergraduates are from California. The following tables show the ethnic and regional breakdown of the student body: UCSC students are known for political activism. In 2005, a Pentagon surveillance program deemed student opposition to military recruiters on campus a "credible threat," the only campus antiwar action to receive the designation. In February 2006, Chancellor Denice Denton got the designation removed. Military recruiters declined to return to UCSC the following year, but returned in 2008 to a more low-keyed student reception and protests using elements of guerrilla theatre, rather than vandalism or physical violence. Thanks to students passing a $3 quarterly tuition increase to support buying renewable energy in 2006, UCSC is the sixth-largest buyer of renewable energy among college campuses nationwide. The Cesar Chavez Convocation is another example of student activism. UC Santa Cruz is also well known for its cannabis culture. On April 20, 2007, approximately 2,000 UCSC students gathered at Porter Meadow to celebrate the annual "420". Students and others openly smoked marijuana while campus police stood by. The once student-only event has grown since the city of Santa Cruz passed Measure K in 2006, an ordinance making