We're following up on a story we did yesterday, from the perspective of Chicago funeral home owner Spencer Leak Sr., about the challenges Chicago is facing in combatting gun and gang violence. On Monday, the Supreme Court struck down a Chicago ban on handgun ownership, a move that divided city residents. Some Chicagoans were thrilled, and say the ability to own a handgun makes them feel safer. Others say even more people will lose their lives. Why is gun violence such a problem in Chicago? The Chicago Police Department says that gang activity was involved in 74 percent of murders in the first five months of 2010. 80 people were shot and thirteen killed over the past two weekends in the city.

Millions of American men are tested every year for prostate cancer, but the blood test used for screening isn’t completely reliable. Now, the American Cancer Society says there's a chance the screenings can do more harm than good. What are men at risk of prostate cancer supposed to do?

Most of us have heard of the hygiene hypothesis. It's the theory that all of our antibacterial soaps and scrubs and sprays are actually weakening our immune systems. But here’s something new: Scientists say you may be able to treat certain diseases like autism and multiple sclerosis by ingesting the same worms we’ve spent all those years trying to kill. The Takeaway talks to Dr. Joel Weinstock, chief of the division of gastroenterology and hepatology at Tufts University Medical Center.