Check Out This Rare Smoke Ring Created By a Missile Launch 

A US Air Force photographer captured a perfect smoke ring during a missile launch today, an awesome phenomenon I've never seen during a rocket launch before. » 3/23/15 5:01pm 3/23/15 5:01pm

A weird black ring appeared in the sky in England and then disappeared

This is bizarre. A 16-year-old girl saw a giant black ring in the sky above England and captured it on video. After three minutes of floating around like a cloud, the black ring disappeared completely. So far, experts have no idea what it was. » 4/14/14 8:38pm 4/14/14 8:38pm

The Mortar that Makes Holes In the Sky

U.S. Marine Corps Corporal James Sauter captured the precise moment when a 120-mm mortar makes a fiery smoke ring in the sky during a training session for Operation Spartan Fury. » 1/24/13 10:11am 1/24/13 10:11am