The Federal Aviation Administration blames a recent software upgrade at a Virginia radar facility for a system outage that caused hundreds of delays

and cancellations, largely at Washington, D.C.-area airports, on Saturday. A new function allowing air traffic controllers to set up a customized display of frequently referenced data overloaded the system's storage limit when deleted data was not removed from the system, according to FAA. The administration has suspended use of that function as it works with its supplier, Lockheed Martin, to determine a solution. The glitch forced FAA to cut arrivals and departures in the area from 11 a.m. to 4 p.m. Saturday, with about 30 percent of normal traffic at Reagan National Airport and Baltimore/Washington International Thurgood Marshall Airport affected, according to FAA.