Deep purples, reds, pinks and oranges filled the sky on the evening of the 15th anniversary of the Sept. 11 terrorist attacks.
Throughout the metro Atlanta area, people took pictures of the sky and sent them to 11Alive.
StormTracker Chesley McNeil explained what causes the bright colors. See the explanation, here.
If you have pictures you'd like to share with 11Alive, email them to us (firstname.lastname@example.org) or drop them on our Facebook page.