FBI again finds itself unable to unlock a gunman's cellphone

The Texas church massacre is providing a familiar frustration for law enforcement: FBI agents are unable to unlock the gunman's encrypted cellphone to learn what evidence it might hold.But while heart-wrenching details of the rampage that left more than two dozen people dead might revive the debate over the balance of digital privacy rights and national security, it's not likely to prompt change anytime soon.Congress has not shown a strong appetite for legislation that would force technology com