that allowed one of the attackers in san bernardino to slip into the country. the president adopting a mostly reassuring tone at a time when some of his critics are saying he's a bit too low key on terrorism. listen. >> for anyone trying to harm americans need to know, they need to know that we're strong and that we're resilient, that we will not be terrorized. >> after the president's visit to san bernardino, he does fly off to hawaii for his long family vacation there, not back in washington until after the new year. john berman, back to you. >> joe, thanks so much. that friend of the san bernardino shooter we mentioned is waking up behind bars this morning. what did officials uncover that led them to bring terror charges? cnn justice reporter evan perez has that part of the story. evan? >> reporter: he's the only person thus far to face any charges as a result of the san bernardino terror attack. enrique marquez is the friend