FBI Director James Comey said Tuesday one of the phones used by the killers in the San Bernardino, California, attacks remains inaccessible to investigators more than two months after 14 people were fatally shot. Testifying before the Senate Intelligence Committee, Comey cited the case as an example of how encryption is affecting counterterrorism efforts. But he said the dilemma of bad guys "going dark" is mostly affecting state and local law enforcement officials who are trying to solve murder, drug and car accident cases. Companies are increasingly making devices such as cellphones with encryption that allows only the people communicating...