Now, yes, pursuing this new strategy will require that we revise the old strategy. In part, this is because the old strategy -- including the Constellation program -- was not fulfilling its promise in many ways. That's not just my assessment; that's also the assessment of a panel of respected non-partisan experts charged with looking at these issues closely. Now, despite this, some have had harsh words for the decisions we've made, including some individuals who I've got enormous respect and admiration for.