 Complete the following phrase:  In 1963, a new tool came to the PRPD, and that was the helicopter. The PRPD air unit was stationed at Isla Grande Airport, later to be known as Roig Police Air Base. Its fleet consisted of Fairchild Hiller FH-1100 and OH-23 Raven. On January 1, 1971 the Order was drawn up which implements 71-1 Labor Standards and Procedures for the Mounted Unit. This indicated that it offers its services mainly in the coastal area in the prevention and enforcement of laws as established in Puerto Rico. If necessary and required the unit can expand its services to anywhere in the island. In 1979, the Puerto Rico Special Weapons and Tactics S.W.A.T. was formed within the Tactical Operations Division of the San Juan area, under the supervision of Sgt. Faustino Mendoza and Commander Jose E. Sánchez. The Puerto Rico Police, decided to create this group after the events occurred with 