thinking about basically full-time for very long time. how significant do you think how against revelation and testimony were today? >> being honest with you, i was so moved to almost emotionally, i've been working on this for eight years, and what she said at the beginning of her hearing, which is that this is something everyone needs to know. when she was looking at the inside information system -- she saying genocide, she saying misinformation, body more patient issues. i should be the only one who knows this. and facebook has this research and it's bad and they're not making choices, they know that when they optimize for engagement they know they optimize for what makes us more certain of the world, more out groups, the other tribe, and makes us more angry. they know that it actually makes political parties more divisive. that they chose to continue the optimization for profit over safety. i just so relate to what she say about this is what the whole world needs to know. --