TRAFFIC ALERT: Both Directions I-70 closed at Morrison Exit; NB Hwy93 closed out of Golden; Hwy. 119 closed; All due to multiple slide offs and crashes.
4G In Denver Among The BestAsk anyone how their cellphone works and you'll probably get an earful. Cell companies are constantly working on improving networks, but there are still gaps. And now they're touting new 4G service. So CBS4's Alan Gionet wondered, what is 4G?

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