Five-year-old satellite CALIPSO took its 3 billionth image June 2 - the image showe a vertical look at the massive smoke plume from the wildfires in Arizona.

CALIPSO has traveled more than 750 million miles as it orbits Earth. The amount of data and images it has recorded would fill 10,500 DVDs or 75,000 CDs ... so far.

Clint Bradford, K6LCS