In this contributed photo, members of Jackson State University’s The Sonic Boom of the South marching band get ready for ... including new tricks and a few surprises, for its performance.

Christian and Christopher Mannery, twin brothers from Mississippi, recently graduated from Jackson State University.

That's because the band had successfully kept the news of its invitation to perform at the world's most-watched sporting event a secret for more than three months. Jackson State University's Sonic ...