NASA's 3-stage lunar lander concept
![NASA's 3-stage lunar lander concept](https://planetary.s3.amazonaws.com/web/assets/pictures/_1200x645_crop_center-center_82_line/15876/20190404_3-stage-lander-concept.jpg 1200w, https://planetary.s3.amazonaws.com/web/assets/pictures/_768x412_crop_center-center_82_line/15876/20190404_3-stage-lander-concept.jpg 768w, https://planetary.s3.amazonaws.com/web/assets/pictures/_576x309_crop_center-center_82_line/15876/20190404_3-stage-lander-concept.jpg 576w)
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