Coca Cola launches obesity advert

One of the world's biggest soft drink companies, Coca-Cola, has taken the unusual step of making an advert to address the problem of obesity in the United States.

The ad, which was broadcast for the first time last night, says the firm is doing its best to provide low calorie drinks.

Coca-Cola says it wants to be part of a national debate an "issue of the times", as Torin Douglas reports.