>> the chicago river now looks more like a shamrock shake as the city gears up for one of the biggest st. paddy's day parade. thousands showed up to watch as motor boat crews poured nontoxic dye into the river, turning it all, yep, bright green. >> the river-dying tradition dates back four decades. >> got to love that. >> got to put in the nontoxic thing. you know that's what people are asking. >> more "world news now" coming up. [ female announcer ] your whites...start out with a bright future... then...over time... become dull... and lose their luster because washing in the bargain brand can leave dirt from the wash on your clothes causing your whites to get dingy. new improved tide plus bleach helps to remove the dirt in one wash to bring your whites back to bright. turning white-ish to...wow. tide plus bleach.