>> tonight, apple versushe fbi. it is an abc news exclusive. one on one with company ceo tim cook. why he is refusing to comply with a federal demand to unlock the iphone of one of the san bernardino killers. >> this case is not about one phone. this ce is about the future. >> how it feels tbe in the eye of the storm in a fierce national debate or security versus privacy. >> it's not just aut privacy,y, it's also about public safety. >> and what he has to say about donald trump's call to boycott apple. >>> plus dalia dippolito made national headlines after she was accused of trying to have her now ex-husband kild in an alleged murder for fire plot. we're there in court as she finally takes the stand. >>> and an emotional comeback for celine dion in her first concert since the death of her husband. "with one more look at you." >> number one in just 60 >>> it's dat bate pitting the fbi over apple. to be night apple ceo tim cook on why he is refusing to help the feds break into the phone gunman. "world news tonight" anchor david muir also gets cook to respond to calls by donald trump

ways are mysterious cause she will be victororious cause she will be victorious >> tonight, apple versushe fbi. it is an abc news exclusive. one on one with company ceo tim cook. why he is refusing to comply with a federal demand to unlock the iphone of one of the san bernardino killers. >> this case is not about one phone. this ce is about the future. >> how it feels tbe in the eye of the storm in a fierce national debate or security versus privacy. >> it's not just aut privacy,y, it's also about public safety. >> and what he has to say about donald trump's call to boycott apple. >>> plus dalia dippolito made national headlines after she was accused of trying to have her now ex-husband kild in an alleged murder for fire plot. we're there in court as she finally takes the stand. >>> and an emotional comeback for celine dion in her first concert since the death of her husband. "with one more look at you."