[Utah-astronomy] smoke rings

In the morning after the large meteor explosion recently, there were smoke rings in the sky. Later, it seems to me, it was reported that these were from a jet contrail and not from the explosion. Last night I watched a national Geographic episode about tracking an asteroid in 2008 and predicting that it would strike the earth in the Nubian Desert. On that show, they showed photographs of the sky after that asteroid exploded and it looked identical to the formations after our local meteor explosion. Opinions?