According to the National Resource Centre on Homelessness and Mental Illness, up to one in four homeless people has a serious mental illness.

ECONOMIST: Mental illness

"Any life spared from cancer or serious illness is a victory, but success comes in little steps -- one life at a time, " said Dr. Marisa Weiss, the president and founder of advocacy group Breastcancer.org and the author of several books, including Taking Care of Your Girls: A Breast Health Guide for Girls, Teens, and In-Betweens.

CNN: Cancer death rate dropped nearly 20 percent in 15 years