STS-131 (April 5–20, 2010) was a resupply mission to the International Space Station. Space Shuttle Discovery was launched pre-dawn from Kennedy Space Center. Once docked to the space station, the crew delivered more than 27,000 pounds of hardware, supplies, experiments and equipment, including a tank full of ammonia coolant that required three spacewalks and robotics to install, new crew sleeping quarters, a window observation facility and a freezer for experiments. During the mission, Wilson was responsible for robotics for spacewalking support using the space station robotic arm and for robotic removal of the "Leonardo" Multi-Purpose Logistics Module from the payload bay of Discovery. For the return to Earth, Wilson robotically installed Leonardo, which was packed with more than 6,000 pounds of hardware, science results and used supplies, inside Discovery's payload bay. The STS-131 mission was accomplished in 15 days, 2 hours, 47 minutes and 10 seconds and traveled 6,232,235 statute miles in 238 orbits.