reporter heather vogell joins me now. welcome, heather. so tell me, how did all of this surface? you have been spending a lot of time reporting on this? >> yes, we first wrote about suspicious scores in at an la a school back in december of 2008 and we did an additional analysis in 2009 and the state started their investigation in 2009. so this has been something that's been out there for a while. but i don't think any of us realized quite how pervasive the problem was. >> ifill: and the response before has been denial when your stories first came out? >> yes. denial. this slowly, as time has gone by we've gotten more admissions of... you know, some cheating here and there, there's an educator who, you know, will do the wrong thing occasionally and as time has gone by and more and more has come out there's been a little bit more concession that there is a more widespread problem. but even today i'm not quite sure that we've gotten really a full... that there's been anybody who's admitted in the district administration that this was really an incredibly serious, serious problem. >