After 37 years of successful airborne science missions, NASA’s DC-8 aircraft completed its final mission and returned to the agency’s Armstrong Flight Research Center Building 703 in Palmdale, California, on April 1. The DC-8 and crew were welcomed back with a celebratory water salute by the U.S Air Force Plant 42 Fire Department after completing an air quality study, the Airborne and Satellite Investigation of Asian Air Quality, or ASIA-AQ mission. The aircraft is set to retire after concluding operations in May. As the largest flying science laboratory in the world, the DC-8 has been used to…