Why Is Google Collecting the Last Four Digits of Kids' Social Security Numbers?

Google has an annual contest for kids called Doodle-4-Google. But for submissions to be accepted this year, Google required parents to submit their child's city of birth, date of birth and the last four digits of their Social Security number. In an article for the Huffington Post, Bob Bowdon, who directed a documentary »2/23/11 3:00am2/23/11 3:00am