Update: February 24
In an exclusive update by David Muir of ABC of Apple's Tim Cook, the Apple CEO said that creating even a secluded back door (or "front door") would be creating the "software equivalent of cancer." He also indicated that the FBI did not handle the phone properly right after recovering it.
Update: February 25
Ellen Nakashima and Todd Frankel report that Apple is making the next generation of iPhones even more unhackable, even after the fact by law enforcement.