Dr. Scott Cohen, author of Eat Sleep Poop, Dr. Bob Sears, author of The Baby Book, and Dr. Lynne Kenney, author of The Family Coach Method discuss the sometimes controversial Cry It Out Method of sleep training. Dr. Cohen maintains it works well for kids over four months of age, while Dr. Sears says it might be harmful to let kids cry for long stretches of time. Dr. Kenney says it's not a one-size-fits all solution.