that business, and they re moving everyone back out to the main area where the ticket counters are that kind of thing until they can rescreen them. it is all happening on the same day they announced enhanced security measures for people coming into the country. a very busy travel day for people coming back from the holidays. susan candiotti on top of the security breach at newark international airport. we will follow it here on cnn. i am don lemon. meantime, state of the union starts right now. i m gloria borger. john king is off today. and this is state of the union. growing questions in the wake of the christmas day terror plot. it was a mix of human and systemic failures that contributed to this potential cat traffic breach of security. how did we miss the signs? and how will the administration make sure it doesn t happen again? we ll put the questions to president obama s top counterterrorism adviser john brennan. then exclusive reaction and perspective from