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Okay now it's clear you misunderstood the purpose. It's a plane with a rocket engine that will ignite upon jetting out of the aeroshell and the wings open up. It's not taking off the ground and it's not multiple flight missions yet.
It's only meant (currently) to enter the atmosphere, start engines, and fly around 500MPH for a few hours before landing. In which time, they will gather a lot of useful data about the atmosphere and regions which are inaccessible to a ground based rover.