Weapons Traffic: DHS Chief Napolitano says she was not aware of agency's link to ATF "gun running"

DHS Chief Napolitano says she was not aware of agency's link to ATF "gun running" "Homeland Security Chief Janet Napolitano today said she knew nothing of her agency's possible involvement in a controversial ATF operation called "Fast and Furious."

In that operation, the Bureau of Alcohol, Tobacco, Firearms and Explosives allegedly intentionally allowed vast numbers of assault weapons to fall into the hands of Mexico's drug cartels. Insiders call it letting guns "walk. ... "

Sources tell CBS News and documents indicate that an agent from U.S. Immigrations and Customs Enforcement (ICE) was working in the ATF group tasked to Fast and Furious. The Department of Homeland Security oversees ICE. Today, Senator Charles Grassley (R-Iowa) asked Napolitano about that at a hearing before the Judiciary Committee."