Food companies have known for decades that salt, sugar and fat are not good for us in the quantities Americans consume them. But every year, people are swayed to ingest about twice the recommended amount of salt and fat — and an estimated 70 pounds of sugar. We speak with New York Times reporter Michael Moss about how in his new book, "Salt Sugar Fat: How the Food Giants Hooked Us." In a multi-year investigation, Moss explores deep inside the laboratories where food scientists calculate the "bliss point" of sugary drinks or the "mouth feel" of fat, and use advanced technology to make it irresistible and addictive. As a result of this $1 trillion-a-year industry, one-in-three adults, and one-in-five children, are now clinically obese.