The first flight of the full Apollo lunar spacecraft, Apollo 9 marked the first piloted flight of the lunar lander and the first time the Apollo spacecraft docked to the lunar lander and extracted it from the Saturn V rocket. The crew spent 10 days testing the lunar lander and moonwalk life support packs. They also practiced emergency transfer of a lunar lander crew to the Apollo Command Module and use of the lunar lander to control and provide propulsion to the Apollo Command and Service Modules in case of emergency.