not only release 55,000 pages of my e-mails, turn over my server, but i am looking forward finally to testifying before congress, something i've been asking for, for nearly a year. >> that was hillary clinton on abc's world news tonight. more on the story and back story from brianna keilar. this is the first time that we're hearing her actually apologizing for this, right? >> reporter: definitely. this was a clear apology, anderson, unlike what we've heard so far. she still stressed that the way she conducted her e-mail practices was allowed under the regulations that governed her while she was secretary of state, but she clearly said there i am sorry, this was a mistake. just compare this to last week when andrea mitchell interviewed her and asked her about this. clinton apologized not for what she did but for the confusion that it accused. yesterday she told the associated press that she had nothing to apologize for because her e-mail procedures were allowed. so it's really what a difference a day makes here.