Congress holds its first hearings Monday on the "gunwalker scandal" that CBS News first uncovered back in February. Officials at the U.S. Bureau of Alcohol, Tobacco, and Firearms (ATF) encouraged gun shops to sell thousands of assault rifles and other weapons destined for Mexican drug cartels. On "The Early Show" Friday, CBS News Investigative Correspondent Sharyl Attkisson reported those who defend the strategy say their goal was to let the little fish go -- to get... (GunPolicy.org)