Since the fourth Friday of the month in December fell on Christmas day, the second LHO Dec. public tour occurred today, 12/26/15.  Arrival time at LSB = 2:30 - 3:15 PM.  Departure time = 5:00 - 5:40 PM.  Group size = ~80 adults & kids.  Vehicles at the LSB = ~30 passenger cars.  The group was on the overpass near 4:15 PM and in the control room from about 4:30 to 5:00.