take us. study us. >> yeah. >> that's what families want, more science. not fear. and not a door slammed in faces. >> kim, thank you very much. and we -- we know why you're very passionate about this. you have three children who were affected, and we really thank you for coming on. >> you're very welcome. >> and for being fair and open. >> thank you. >> we love hearing from the parents. >> thank you for inviting me. >> elizabeth cohen, you can see why she is so passionate about it as are many parents who are living with this story. >> absolutely. what does it all mean for doctors trying to ninefind a treatment or a cure for autism? we'll ask a doctor from vanderbilt medical school in a bit. there you see him right there. first now we want to give you some of the top stories here on cnn. the u.s. could be the target of an attempted terror attack in the coming months. top intelligence officials say it is certain. they testified before a senate committee just yesterday, the heads of the cia and fbi did not