Do you like it here? <a href="http://barlens.com.au/genotropin-copay-card-72f7.pdf#industrial">genotropin ventajas y desventajas</a>  The lander primarily is intended to test the technologies needed to touch down on Mars, a notoriously difficult task that has bedeviled nearly all of Russia's previous efforts and has given NASA trouble as well. The United States currently has two operational rovers on Mars, Curiosity and Opportunity.