NASA's InSight lander arrived on Mars last week and now it's prepping for the next stage of its mission. The lander is equipped with a nearly six-foot-long arm, which will be used to lift sensitive scientific instruments off of the lander and place them on the Martian surface -- the first time a robot has been used to do so on another planet. Thus, the arm plays a really key role in this next step of the InSight mission, as placement will be crucial for the mission's overall success. But new images from InSight show the lander is up for the challenge, as the arm is working and has already started to collect images of its surroundings, information that scientists will use to determine where InSight's instruments should be placed.