International Herald Tribune: BOULDER, Colorado: As she squeezed herself into a telephone-booth-size elevator to ascend a 984-foot tower in Colorado’s eastern plains, Dr. Arlyn Andrews said with a grin, “This makes me want to go rock climbing.” It’s a good thing she loves climbing tall structures. Andrews, an atmospheric scientist at the National Oceanic and Atmospheric Administration in Boulder, climbs the tower periodically to make sure the narrow tubes running from the tower to analyzers nearby are properly …