 We're getting you up to speed with the three big things you need to know every 15 minutes. Three. Happening today, you're likely to hear the sound of drums and whore lines around Green Country today as the ensembles of Marching Music's Major League practice for their competition tonight, Broken Arrow, Drum Corps International's Drums of Summer. It's the first time this season the top eight marching units in the world compete head-to-head.