Environment: Hidden Stores of Poison

For the past five years, Colorado authorities have been planning to build a new $22 million runway for Denver's Stapleton International Airport on about 600 acres of land belonging to the U.S. Army's Rocky Mountain Arsenal. The Army turned over the deed to the land in 1969, but as late as last May, it was forbidding jets to fly over the area because of unspecified "safety factors." Denver Mayor William H. McNichols finally went to Washington to find out what was causing the delay. He soon learned. Beneath the prospective flight approach, the...