As baby boomers age, Alzheimer's disease could become the nation's greatest health care crisis. Is there an effective treatment on the horizon? Might the disease be prevented? Will we provide enough funding for Alzheimer's research, and to care for those stricken by the disease? We look for answers to those questions in this five-part series.

Journalist Charles Sennott retraces Jack Kerouac's cross-country journey of discovery