Lubbock Preston Smith International Airport in Lubbock, Texas, had been shut down for nearly a week after problems with the instrument landing system forced numerous flight delays and cancellations. FAA spokesperson Lynn Lunsford pointed to electromagnetic and radio interference as the cause. “There was a spurious radio signal in the vicinity of the final approach path, doing just enough to cause our signal to be erratic,” Lunsford told the Avalanche-Journal.Read more from Lubbock Online.