FBI director says unlocking method won't work on newer iPhones

(Reuters) - The Federal Bureau of Investigation's secret method for unlocking the iPhone 5c used by one of the San Bernardino shooters will not work on newer models, FBI Director James Comey said. Apple's shares were down 1.3 percent at midday. Comey added that the technique would not work on the iPhone 5s and the later models iPhone 6 and 6s.