jim glantz, i want to start with you. i'm hoping that you can explain a in a little bit more detail what the blind sheer ram is. >> hi, gwen, yeah. the blind sheer ram is previously obscure device that is sort of the last finger in the dike. when you have an explosion like this. what it's supposed to do is move across the center of that blow-out protecter, sheer the drill pipe and then some seals on it. it's a very strange little device that is supposed to seal off that well and keep the volcano of gas and oil from coming up the well. what we found in our piece today is that as early as 2001, studies showed that if you had just one of those blind sheer rams, you had a real chance that part of the hydraulics feeding it, another obscure part called a shuttle valve, would represent the largest amount of risk. in other words, it would be sort of the place where things would most likely fail if they did fail. we don't think we found, so to speak, the o-ring or the piece of foam in the shuttle disaster yet. but we do think inve