The World Trade Center may have collapsed but nature hasn't skipped a beat. Right on schedule the trees are putting on their annual big show before the onset of winter. For those of you who have never seen it the coloring of the leaves on the trees in forested areas is quite a spectacular sight. As every high school science A student knows the leaves don't really change color, they simply lose the summer long dominant green color to reveal the colors underneath. There is an excellent and easily understandable explanation of all this at the Fall Foliage Page at the Weather Channel Web Site.