CBS Evening News | The number of heroin users in the U.S. has doubled since 2002 to 335,000 people, and deaths related to drug have jumped 44 percent in just five years

The number of heroin users in the U.S. has doubled since 2002 to 335,000 people, and deaths related to drug have jumped 44 percent in just five years. A new drug cocktail of heroin laced with the powerful pain reliever fentanyl has been blamed for 22 recent deaths near Pittsburgh. Vinita Nair reports. Air Date: Feb 3, 2014