good morning. i'm alison kosik. welcome to the "newsroom." first, we go to florida where the judge in the george zimmerman case just made a key ruling this morning. she says two experts who analyzed voices screaming on 911 calls cannot be used. george howell joins me live now. george, what is in this ruling? >> alison, let's start out by listening to that audio because what you're listening to, the screams on that tape, is it trayvon martin? is it george zimmerman? let's listen. >> does he look hurt to you? >> i can't see him. i don't want to go out there. i don't know what's going on. they're sending -- >> so you think he's yelling help? >> yes. >> all right. what is your -- >> here is the deal. the prosecution brought in its own expert witnesses, and through their methodologists