A school district outside of Buffalo has installed a facial recognition system intended to spot potentially dangerous intruders. State officials are concerned about privacy. Employees with the Education Department plans to meet with Lockport City School officials about the system. The $1.4 million Canadian-made system is being tested this week. It is designed to enable security officers to quickly respond to the appearance of expelled students, disgruntled employees, sex offenders or certain weapons the system is programmed to detect. The technology is also being used in airports, motor vehicle departments, stores and stadiums, but rare in public schools. San Francisco became the first U.S. city to ban its use by police and other city departments. Oakland is among others considering similar legislation.