170428-N-WV624-233 INDEPENDENCE, Iowa (April 28, 2017) The small ensemble, "Wavelength," performs an a cappella piece as sung by Pentatonix during a performance at Independence Junior Senior High School. The "Sea Chanters" chorus is on a 21-day tour of the Midwest United States connecting communities across the United States to their Navy. (U.S. Navy photo by Musician 1st Class Sarah Blecker/Released)