sentences:  The "service tunnel" itself was constructed in 1939 as a Public Works Administration project.The tunnel was first painted in 1968, when it was painted red and white to celebrate the military veterans of North Carolina
  
  Fans of other universities' sports teams often come to the Free Expression Tunnel before and sometimes after big athletic events to paint the tunnel with their teams' athletic colors as part of a prank.Carolina Tar Heel fans have a long history of doing this prank as well as fans from East Carolina University.