April 30, 2010 9:02 pm Illegal Immigrant Costs, Benefits Disputed For all the rhetoric about how much illegal immigration costs California and other states, economists who have studied the issue say the underlying numbers are conflicting and conflated. US & World Videos 0:28 A Vermont state trooper plunges into icy pond to rescue 8-year-old girl 2:59 Keep these travel etiquette tips in mind this holiday season 2:20 Bodies of Missing Men Found in Rubber Bins Inside Storage Unit 1:42 Hundreds of Golden Retrievers Walk a Mile for the Official Boston Marathon Dog 1:51 Typewriter Shop Owner Receives Gift From Tom Hanks