Crews are trying to make sure no more cars get swept off a Colorado mountain highway by avalanches.
They fired artillery shells Dunday to try and safely trigger avalanches before they could pose a threat to traffic.
Saturday, a snowslide knocked two cars off the road in a high mountain pass, burying them. Eight people were rescued.
The highway leads to one of Colorado's biggest ski areas, Winter Park Resort.
The pass was opened again Saturday night.
Crews continued to search the area for other vehicles, but believe they've all been found.
On Sunday the wind was whistling through the mountains west of Denver at 100 miles an hour, producing whiteout conditions and driving wind chills below zero.