Analyse @NASA's tweets
"We're going in." "Touchdown declared. Sampling is in progress." @OSIRISREx touched the surface of asteroid Bennu to capture rocks & dust with its robotic arm. After this brief TAG (Touch-And-Go maneuver), it will fire thrusters to back away to a safe distance. #ToBennuAndBack https://t.co/RPd5R3cWUD