 Complete the following phrase:  Rodríguez Brothers Racetrack is a race track in Mexico City, Mexico, named for the famous Rodríguez brothers, Pedro and Ricardo. Built in a public park in 1962, the circuit hosted its first Formula One Grand Prix the same year, as a non-Championship race. The following year the Mexican Grand Prix became a full World Championship event. The circuit remained part of the F1 calendar through 1970, when spectator overcrowding caused unsafe conditions. When the track re-opened in 1986, the circuit boasted a new pit complex, as well as improved safety all around. The Mexican GP remained until 