Apple CEO Tim Cook responds sharply to federal court order in the U.S. that would require the company to help the FBI search the contents of an iPhone 5c seized from Syed Rizwan Farook, one of the terrorists in the San Bernardino, California, attack on Dec. 2. Cook wrote in an open letter to customers posted on Apple’s website on Wednesday. The tech industry has been increasingly using encryption in its products and services. The move has been criticized by government officials, including FBI Director James Comey, who say it makes it more difficult for them to track terrorists.”]