@CNN: JUST IN: Mark Zuckerberg is leaving the door open to testifying before Congress in the wake of a data debacle that has upended Facebook this week https://t.co/Uitzf3sNbO https://t.co/osX8ISE1d0

@CNN: JUST IN: Mark Zuckerberg is leaving the door open to testifying before Congress in the wake of a data debacle that has upended Facebook this week https://t.co/Uitzf3sNbO https://t.co/osX8ISE1d0