mr. powner brought up. what can we do in the latter years, once we get to a robust state, what do we have to lost goes-t and "u" on a rapid time frame. the answer is probably not, we'd launch on need when we get to that. two comparisons here. one is the cost of storm if we build and store. the other is the cost impacts of delaying the development. based on industry assessments and industry model of the efficiency of building four in a rapid sequence is more effective in terms of buying parts, getting the workforce gained, buying down the risk of implemei implementati implementation. we actually have seep the example friday arrow situation and industry examples, build first, launch later if necessary, as a certain cost benefit from the build and development psych chel and you i would down the risk when you build them all at the same time when you have the parts, availability and engineering. >> okay, all right. earlier this year your office hosted a community engagement work shop to inform outside groups in