Pompeo to replace him. and mark zuckerberg says he would testify before congress if he's the right person to answer questions about the data breach. zuckerberg apologized for the breach and said he would be willing to answer questions. >> this was a major breach of trust. i'm really sorry about this. we have a basic responsibility, to protect people's data. if we can't do that, we don't deserve to have the opportunity to serve people. facebook testifies in front of congress regularly. we try to send the person at facebook that has the most knowledge about what congress is trying to learn. if i...