What does Mark do after his family leaves for Orlando before he reports to work?

General Hawker returns early to Offutt Field's Hole at 0500. He meets with Colonels Atkins and Bragg in the Control Room for updating. There is no communication from Moscow but reports about unidentified movements and refused calls to Moscow come in. He worries that dawn approaches in an hour and they can't count on more than fifteen minutes warning. Mark proposes the General ask for release of weapons. Ace agrees and the General telephones the Chairman of the Joint Chiefs. Weapons are released at eleven forty-four, Zulu. NORAD rings to advise an object from a Soviet base is detected. NORAD rings again with notice of four ballistic missiles from the sea and red alert.