Yep, that's Sorghum. Like @steven-patrick said, it's also Milo. Although in my experience, milo is the seed and sorghum is the plant. Sorghum syrup is made like corn syrup, by grinding the stalks and getting the juice. And then boiling that down. In high school, I spent one summer working experimental sorghum fields. Walking up and down, up and down, forever, cutting all the seedheads that were too tall. The breeders were trying to develop a shorter plant that worked better with the combines and wouldn't fall over in the Kansas wind. Those fields used to be a great place to hunt pheasant after the crop is done.