Gov. Bill Ritter said Wednesday that the pine beetle epidemic that has killed nearly half of the state’s lodgepole pine trees will have an “impact for generations to come” and will change the look of Colorado’s forests. After getting a look at stands of dead trees from the air, Ritter said the outbreak is part of a natural cycle that has been encouraged by the drought, milder winters and the fact there are so many clusters of the same type and age of tree that are attractive to the beetles. He said the epidemic can’t be stopped, only managed to...