Mars and the Moon can be tough on spacesuits. So can Arizona’s high desert, and it’s a lot easier to get to. That’s why a NASA-led team will head for sites near Flagstaff, Ariz., this month to try out equipment — spacesuits, rovers and science gear. The tests could help America pursue the Vision for Space Exploration to return to the Moon and travel to Mars. The team will conduct a series of live satellite link videoconferences between researchers in the field and students at eight NASA Explorer Schools. Three of the videoconferences — at 2 p.m. EDT Sept. 16, 1 p.m. EDT Sept. 21 and 2 p.m. EDT Sept. 23 — will also be available to Internet audiences through Web casts.