facebook's sheryl sandberg spoke about russian-linked ads. she apologized and the benign platform defense. >> we're a platform where people express themselves every day and keep our platform as free of abuse as possible. we're a new kind of platform. in our heart, we're a tech company. we don't hire reporters, no one's a journalist. we don't cover the news. but when we say that, we're not saying we don't have a responsibility. in fact, we're a new kind of platform with our size we think we have more responsibility. >> co-editor of a platform in some ways and senior editor of "new york" magazine. they are joining me now. it's like, what are you? what are you? what is facebook? >> it's a platform, sure. it's also a community about 2