
Isn't it time to start thinking in terms of Human Mission Support?
While general Mars surveys and mapping is a worthy goal, given the lead time for Martian probes and rovers, isn't it time to start planning a mission to survey potential landing sites for the first human landing on Mars?
Ideally, the site would have a range of terrain within a reasonable distance, with a range of geology to study. Water would be present, probably underground, but accessible without too much work, and of course an area of flat terrain for an easy landing.