New details on why NORAD may be detecting more objects.

An official, speaking on the condition of anonymity because of the sensitivity of the issue, said that sensory equipment absorbs a lot of raw data, and filters are used so humans and machines can make sense of what is collected. But that process always runs the risk of leaving out something important, the official said. “We basically opened the filters,” the official added, much like a car buyer unchecking boxes on a website to broaden the parameters of what can be searched.