Is CBS News guilty of corruption?

  If you've been following Fast and Furious, and you probably haven't if your only source of news is the MSM, you know that things have heated up significantly in the last few weeks.
  Fast and Furious was an ATF plan to release weapons to drug cartels by intentionally selling weapons to persons of nefarious character.
  Consequently hundreds of people have been killed, including two border agents.
  Here is a complete listing of our coverage, including audio and testimony from the agents involved and all the columns Hoosierman has written about the subject. 
Since Cheryl Atkisson revealed that she was screamed at and yelled at by White House officials, it appears that CBS has stopped her from commenting because, as we all know, the purpose of the news media is to keep the news from getting out.
  Mark Hemingway at Weekly Standard reports:

Today, I called CBS News in an attempt to interview Attkisson. I was told by CBS News senior vice president of communications Sonya McNair that Attkisson would be unavailable for interviews all week. When I asked why Attkisson would be unavailable, McNair would not say. 

I've also heard from a producer at another media outlet that has previously booked Attkisson that they tried to book her since she made news with the Laura Ingraham interview yesterday. They were also told that she would be unavailable.

  The question is where is the hunger to uncover the truth when it comes to this scandalous administration?
  And it's one thing to blithely ignore news; it's something completely different to not ignore the news reporters don't like, but prevent your reporters from telling the story.
  Since Atkisson told this story, why has she been in lockdown? Why is CBS preventing the truth from being known?
  If this is the choice of CBS News and if they are preventing the reporter from speaking her experience with this White House, this is beyond bias.
  This is malfeasance, deception and corruption on the part of CBS News.
UPDATE: She says no.