To work. that's what is scheduled to happen on this thursday. the next key date is saturday. by saturday they'll have the diagnostics competed to be able to make decisions about what the next steps are in terms of top valve or a new preventative mechanism. so the key dates are this thursday and saturday relative to being able to predict on what will happen. >> if the smaller cap doesn't work, the next step would be to just take junk and throw it down there to stop it, is that right? >> well, with the top hat, what they have is a top hat that they will deploy but they have another mechanism in ...