Hear, hear, and I would add that, for me, a finding that there is no life on Mars would be as interesting as discovering it there. Did life once exist and went extinct? Or did it never gain a foothold there? Is it only beneath the surface? If there is/was life, did it originate from earth or arise independently? Resolving these questions one way or the other will enable us to much more clearly understand what life's limits are, and thus contribute enormously to gaining some ground on the bigger questions of how common life might be outside our solar system. These wonderful machines are just the vanguard of a fleet of robots that will answer these questions over the coming decades. It is an exciting time.