the c.e.o. of facebook is under enormous pressure as he makes his way to a congressional hearing called by u.s. lawmakers. facebook has been harshly criticized since news broke of the enormous abuse of its data by cambridge analytical. senators have been questioning mark zuckerberg about his company's carefree attitude toward its customers data and possible manipulation of the u.s. electoral system through the use of such data. zuckerberg performance was contrite and apologetic we didn't take a broad enough view of our responsibility and that was a big mistake and it was my mistake and i'm sorry i started facebook i run it and i'm responsible for what happens here. although zuckerberg came across as well prepared and willing to accept criticism he wasn't making any promises it's not enough to just give people a voice we need to make sure that people aren't using it to harm other people or to