Los Angeles officials did not turn that feature on, Wiggins said, and he said he had lingering questions about whether the technology worked well enough to be relied upon. The device does have facial recognition technology, which can prompt privacy concerns. has also undergone tests in Washington, D.C., and Denver, and at London’s Heathrow Airport, officials said. Backpacks, briefcases and luggage would probably still need to be searched by hand. The technology would likely be held in reserve for days when security officials suspect a heightened risk of attack, Wiggins said. The devices cost about $60,000 each, and Metro would need to buy and install about 20 for Union Station alone, Wiggins said. After the test ends, Metro will analyze the accuracy of the results before deciding whether to buy any of the scanners.
