(train horn) vo: wherever our trains go, the economy comes to life. norfolk southern. one line, infinite possibilities. ♪ [ indistinct shouting ] [ male announcer ] time and sales data. split-second stats. [ indistinct shouting ] ♪ it's so close to the options floor... [ indistinct shouting, bell dinging ] ...you'll bust your brain box. ♪ all on thinkorswim from td ameritrade. ♪