Twining Elementary School Gate to close Published July 3, 2012 By Staff Reports 319th Air Base Wing Public Affairs GRAND FORKS AIR FORCE BASE, N.D. -- The Twining Elementary School Gate will close at 6 p.m. July 6, 2012, and will remain closed until further notice. The South Gate will remain open 24 hours a day, seven days a week. All traffic leaving the installation, private or commercial, must exit through the South Gate. The Visitor Control Center (VCC) hours of operation will remain the same, from 7 a.m. to 4 p.m., Monday through Friday. The VCC will only be accessible from off base. The Commercial Visitor Control Center hours of operation will also remain the same, from 6:30 a.m. to 7 p.m., Monday through Friday. All commercial vehicles are required to process through the commercial search area. For more information, call the Base Defense Operations Center at 747-5351.