The Federal Aviation Administration plans to implement furloughs for air-traffic controllers starting Sunday. The FAA's extensive ground-delay program and other traffic-management protocols could delay as many as 6,700 flights a day at 13 of the largest U.S. airports. Airlines for America pledged to take action over the controller furloughs. "The math simply doesn't work," said Jean Medina, a spokeswoman for A4A. "We find ourselves with little choice but to actively review all of our legal options to protect our passengers and shippers from being needlessly impacted."