 They told him that a slight temperature inversion was present over the city, but Holcomb felt that the inversion was not "nearly strong enough to explain the 'good and solid' returns" on the radarscopes.Fournet relayed that all those present in the radar room were convinced that the targets were most likely caused by solid metallic objects.There had been weather targets on the scope too, he said, but this was a common occurrence and the controllers "were paying no attention to them."