President Barack Obama had his vacation interrupted by a briefing on a failed terrorist attack on a Northwest flight as it was landing in Detroit.
He discussed it with security officials on Christmas Day and stricter security measures were quickly imposed on airline travel.
Later in the day, he visited military members and their families at a Marine Corps base near his vacation home in Hawaii.
Obama and first lady Michelle Obama made an unannounced stop at Marine Corps Base Hawaii as military members at their holiday meal. He walked through the dining hall and thanked men and women in uniform for their service.
Obama is spending his holiday at a rented home nearby in Kailua.