biased. so that s a conversation that shouldn t get lost in a lot of the political theater. we understand in the run-up to today, zuckerberg spent weeks preparing. yeah, a source said they took over a conference room and they did these mock hearings. they set it up like a congressional hearing room. this is a very new setting for mark zuckerberg. this is not an outward facing ceo. and the idea the source told me was to be contrite, humble, and respectful, which i think he was able to do. but a lot of the people that would criticize some of the questioning wasn t that tech savvy. thank you very much. a canadian digital advertising firm with ties to cambridge analytica to the brexit movement of the uk is temporarily banned from facebook over the possible misuse of personal facebook data. it says it has done nothing wrong, but drew griffin says the little known firm appears to be at the center of a new type of campaigning weaponizing target messaging.
from facebook over the possible misuse of personal facebook data. it says it has done nothing wrong, but drew griffin says the little known firm appears to be at the center of a new type of campaigning weaponizing target messaging. here s drew s report. reporter: they created what they call a database of truth. the ability to collect shopping records, social media connections and voting records to create individual profiles on almost every voter in the united states. and according to chris vickry, used that information to influence voters in a way never seen before. kind of like being able to whisper in somebody s ear any message you want and nobody else is going to find out about it. think of all the things you can do with that ability. reporter: he s director at data risk security firm. it was through his sleuthing