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LOCKPORT, IL - JULY 12: A worker stocks pistols being offered for sale at Rinks Gun and Sport in suburban Chicago on July 12, 2010 in Lockport, Illinois. Chicago began enforcing its new gun law today, considered the toughest in the nation. Although Chicago residents can now possess handguns in the city, they are still forced to purchase guns and ammunition in the suburbs because the sale is outlawed in the city. The United States Supreme Court ruled against the old Chicago law, which banned ownership of handguns, because it violated the second amendment. (Photo by Scott Olson/Getty Images)
LOCKPORT, IL - JULY 12: A worker stocks pistols being offered for sale at Rinks Gun and Sport in suburban Chicago on July 12, 2010 in Lockport, Illinois. Chicago began enforcing its new gun law today, considered the toughest in the nation. Although Chicago residents can now possess handguns in the city, they are still forced to purchase guns and ammunition in the suburbs because the sale is outlawed in the city. The United States Supreme Court ruled against the old Chicago law, which banned ownership of handguns, because it violated the second amendment. (Photo by Scott Olson/Getty Images)

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Gun control and public health

CNN's Christine Romans talks to a doctor about how health professionals could play a role in the gun debate.

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