we begin with the resignation of a key executive in the rupert murdoch media empire. rebekah brooks is out. many people were outraged when brooks kept her job after the newspaper was shut down for scandalous reporting tactics. and as brooks steps down, the investigations ramp up. the fbi now investigating the murdoch empire right here in the united states. lawmakers demanding the probe amid reports that murdoch s journalists hacked the cell phones of 9/11 victims and their families. susan candiotti in new york with the details now. susan? reporter: hi, kyra. good morning to you. yes, this investigation is now 24 hours old. as fbi tries to figure out how they are going to approach this. all of it started, kyra, with a report in a british tabloid that a private investigator here in new york, that there was an attempt to hire him to hack into phone records of 9/11 victims and families, as well as reach out into the voice mails of 9/11 victims and families. the fbi, that appear