YOU might think the depths of the Grand Canyon would be a place of restful quiet. But with well over 100 helicopter and light-plane flights passing low overhead every day, calm is often in short supply. Now the Sierra Club, a US environmental organisation, is calling on Congress to end a two-decade fight over the Arizona landmark’s airspace and to curb the flights.
The issue was meant to be resolved by a 1987 act that required the Federal Aviation Administration (FAA) and other agencies to restore quiet to the canyon, so that visitors could contemplate its wonders in peace. Yet…
