[on kneeling while singing the National anthem before the start of the Tennessee Titans and Seattle Seahawks football game at Nissan Stadium] I was absolutely terrified walking out there. I knew what I was getting ready to do, and I understood what it meant. Obviously I made a name for myself in country music, and I knew what the backlash would be. So I walked out there scared. But I have to go into my gut and my heart, and I knew that was the right thing to do today