As a part of the Carl and Carolyn Benfro Endowed Lectureship Program, Grammy Award winning Shenandoah performed at Northern Oklahoma College on Thu., Sept. 29. This performance was also apart of Shenandoah’s 35th Anniversary Tour. During those years, the band amassed more than 300 million stream, over 8 million combined album sales, and 13 number one radio singles. It is safe to say that they…