A powerful Winter Storm Selene hammered the Rockies, Plains and Midwest Wednesday and Thursday, bringing an entire region to a halt, both on the ground and in the air. In Colorado, the state's National Guard resources were deployed to assist with rescue missions as every major highway leading out of Denver was closed, making travel nearly impossible Wednesday afternoon. More than 1,300 flights were canceled Wednesday at Denver International Airport, and officials were forced to halt all operations for several...