Denver International Airport received complaints from some airlines on Thursday for allegedly not clearing runways of snow quickly enough -- but DIA spokesman Chuck Cannon believes the facility well. "Obviously, things slowed down on Wednesday and Thursday," he concedes, "but they have to when you have blizzard conditions like we had yesterday. It really wasn't the snow so much as the wind. It's tough to operate in weather like that, particularly when you have to be safe -- and safety's t