Bark beetles continue to be a problem in Colorado and the Western US. The bug kills trees by introducing a fungus and eating away at the living portion of the trees. The beetle is native to the region, but years of warmer than average winters have allowed its numbers to soar. That, coupled with the uniform age of the state's lodge pole pines has created a potential tinderbox. On Monday, Senator Mark Udall announced legislation that he hopes will slow the bark beetle epidemic. KDNK's Conrad Wilson reports.