Celebrities battle cancer

Joan Lunden returned to her old stomping grounds, ABC's "Good Morning America," with a personal news update on June 24. The former "GMA" host revealed that she's facing an "aggressive" form of breast cancer.

Joan Lunden returned to her old stomping grounds, ABC's "Good Morning America," with a personal news update on June 24. The former "GMA" host revealed that she's facing an "aggressive" form of breast cancer.