(Portland, OR) -- Portland Police is expanding its drone program. A pilot drone program is ending and Portland City Council approved making it permanent. During the pilot, drones were used for traffic crash investigations, search and rescue operations, and for investigations by the Metro Explosive Disposal Unit. Sixteen pilots have been trained and 19 drones were purchased. Three of the drones are capable of flight in wind and rain. Under state law, police can't use drones for random surveillance, targeting a suspect solely based on individual characteristics, and use during crowd control, along with other limitations.