 Pop a multivitamin every day. They may not be doing as much good as you've hoped. Researchers at the National Institutes of Health studied more than 400,000 healthy Americans over the age of 20 and found taking daily multivitamins did not help them live longer. Experts say it's best to get them from food. The number of animals and plants in danger of disappearing is skyrocketing. CBS's Cammie McCormick.