night immediately following athletic victories and certain academic achievements. The Court of North Carolina, just west of the Memorial Belltower, is surrounded by the 1911 Building; the College of Humanities and Social Sciences in Tompkins, Caldwell, Winston Halls and The College of Education in Poe Hall; Page Hall, home to College of Engineering offices; and Leazar Hall, former location of the Computer Science Teaching Labs. It was once home to 100 trees (one for every county in North Carolina), but damage caused by Hurricane Fran in 1996 reduced the number significantly, including the destruction of a particularly old and large tree which was some in diameter. Some replanting has occurred, but the Court's former appearance is far from being restored. Southwest of the Court of North Carolina is another landmark, the Free Expression Tunnel. The Tunnel functions as one of three pedestrian tunnels underneath the railroad tracks separating North Campus and Central Campus. This particular tunnel is the site of sanctioned graffiti; anyone may paint there, and it is often the place for political statements, personal messages, and art. This tunnel also serves as a way to advertise events going on around campus. In 2008 racist and threatening graffiti directed at (then) President-elect Barack Obama prompted an investigation from the United States Secret Service. Students held a "Unity Rally" in response to denounce the acts of racism. The Wolfline bus service connects points on the campuses with each other. Centennial NC State's main campus is augmented by the mixed-use Centennial Campus. Located south of the Memorial Tower, this campus houses university, corporate, and government research, in addition to classrooms and non-student residences. The Wilson College of Textiles has been based on this campus since 1991. Beginning in 2002, the College of Engineering began to relocate to Centennial Campus. Six of the nine College of Engineering departments are housed in three Engineering Buildings in an area known as the Engineering Oval. The Golden LEAF Biomanufacturing Training and Education Center (BTEC), part of the College of Engineering, is located adjacent to the Engineering Oval. The offices of ABB, LexisNexis and the National Weather Service are also on the Centennial Campus, as well as Centennial Campus Magnet Middle School. Centennial Biomedical Campus The North Carolina State University Centennial Biomedical Campus is located west of the NCSU Memorial Tower. North Carolina State University College of Veterinary Medicine, NC State's professional college and North Carolina's