tiger shark while scuba diving. the shark grabbing hold of her legs. her dive instructor attacked, too, while trying to fight off the shark. the instructor survived. president trump shrinking two national monuments in utah. signing proclamations to dramatically scale back bears ears by more than 80%, and the grand staircase escalante by nearly half. the president claiming he's, quote, reversing federal overreach. the sites spanning several million acres that contain large amounts of oil, gas and coal. native american and environmental groups are now protesting those moves. and it took two stakes, the pontiac silverdome standing strong after demolition crews tried to bring it down yesterday. the contractor blaming a wiring issue. so, they tried again today. the explosions going off as planned and eventually reduced to a cloud of dust and debris in just seconds. didn't want to give up. when we come back on a monday night, the battle of the christmas lights in neighborhoods across this country. you be the judge when you see this.