Why groups are fighting over obscure 1960s-era ‘slot and perimeter’ rules at DCA

A view of Reagan National airport.The control tower, terminal, and Washington Metro are visible (Getty Images/iStockphoto/Skyhobo)A view of Reagan National airport.The control tower, terminal, and Washington Metro are visible (Getty Images/iStockphoto/Skyhobo)This spring has seen increased bickering in Northern Virginia over two little-known aviation regulations called the slot and perimeter rules, which govern operations at Ronald Reagan Washington National Airport in Arlington County. What exa