John McCain: “If we are going to cancel this program and pursue a different path, we should only do so under the following conditions…”

“If we are going to cancel this program and pursue a different path, we should only do so under the following conditions: (1) the President has demonstrated a clear vision for human space exploration and adequately explained why it is superior to the Constellation program; (2) the alternative provides significant advantages in cost, schedule, performance, and safety; (3) the potential consequences of changing course mid-stream do not outweigh the anticipated advantages of such a significant shift in policy; and (4) we are able to maintain our leadership in space exploration.”