On the evening of 07/27/16 at approx. 9:30 - 9:40 P.M my husband was walking our Dog on the corner of Mira Loma and Santa Ana in Reno, NV and observed in the southern night sky: 2 ball like bright white lights traveling closely together, that flashed red/green and white, sparks with trailing tails like comets but traveling very very slowly across a clear dark night sky. He saw this for perhaps a minute before they traveled out of sight. Didn't have a cell on him to take a picture. He thought it might be space junk?? as it appeared there were pieces falling off of these lights or objects. Or it could be something else... Traveling too slowly for a comet or a meteor. I'm commenting because these were apparently sighted in AZ, CA and Los Vegas NV. and perhaps other places as well, and all tonight.