Before revision: On July 24, 1986, the FAA of United States and NASA signed a memorandum of agreement to formally begin the Airborne Wind-Shear Detection and Avoidance Program (AWDAP).
After revision: On July 24, 1986, the FAA and NASA signed a memorandum of agreement to formally begin the Airborne Wind-Shear Detection and Avoidance Program (AWDAP).