SILVER SPRING, Maryland, Oct. 17 -- The National Oceanic and Atmospheric Administration issued the following news: NOAA scientists investigating the stratosphere have found that in addition to meteoric 'space dust,' the atmosphere more than seven miles above the surface is peppered with particles containing a variety of metals from satellites and spent rocket boosters vaporized by the intense heat of re-entry. The discovery is one of the initial findings from analysis of data collected by a hi  more