I would like to also hear an explanation of how the Obama campaign apparently grabbed data in 2012. - how was this episode discovered? what was FB's initial re

I would like to also hear an explanation of how the Obama campaign apparently grabbed data in 2012. - how was this episode discovered? what was FB's initial reaction and can it be justified? - are the allegations true? including the one that FB employees collaborated on it. Silence on it only deepens suspicions. - was this done in a similar way (3rd party dev, etc)? If not, how was it done? - who were the actors in that episode? What was the actions taken then? - what about the pedigree of those who rightly raised the issue in the 'Cambridge Analytica' episode? Did they not have the information for the 2012 episode? How did they find this out?