It's just that the physical occurrence of a heavy impactor that shows a direction toward Earth can be so -- final.

For instance:
Over the past week, my bought with the flu took precedence over this board, as well as NEA approaches. By no means should this imply that the impactor threat lost its overall value.

Your summation of the Langley release that: there is more than two to four times more radiation escaping from the Earth than previously thought possible" might be referring to the amount of reflective energy that escapes daily, implying the Earth to be a brighter planet than previously thought.

As Tom stated, posting a link to, or a verbatim copy of, the release would be helpful.

Dan