With few cancer patients participating in research studies, a trove of data is left behind. Last year, there were an estimated 1.7 million new cases of cancer diagnosed in the United States. Nearly 600,000 people died from the disease, making cancer the second-leading cause of death in the nation, according to National Cancer Institute. But fewer than 5 percent of American cancer patients participate in a key part of the research for a cure -- clinical trials testing new cancer treatments. NewsHour Weekend's Christopher Booker reports on efforts by researchers to improve that low participation rate, all in the hope of extending and saving lives.