One of America’s most iconic monuments is going dark to save lives — but not humankind

An American landmark is doing its part by going dark this month. The Gateway Arch, which has triumphantly bent over St. Louis, Missouri, for more than half a century, will now bow to nature. Throughout September, the lights on this Midwestern marvel will be turned off as millions of migratory birds begin their journey south. The Gateway Arch, which has triumphantly bent over St. Louis, Missouri, for more than half a century, will now bow to nature. Getty Images/iStockphoto The Arch’s exterior lights will be turned off each evening to reduce the risk of disorienting the birds, as the brightness can cause them to veer into buildings or stray from the correct migration route. St. Louis, and its resplendent Arch, critically sit on one of North America’s busiest avian superhighways: the Mississ