investigation. our thanks to you this morning. the two men suspected of boston marathon bombings are of chechen heritage. now questions if the attack has their ethnicity irrelevant here. we'll have that next. ♪ (train horn) vo: wherever our trains go, the economy comes to life. norfolk southern. one line, infinite possibilities. see lioutdoors, or in.ight. transitions® lenses automatically filter just the right amount of light. so you see everything the way it's meant to be seen.