Is it or isn't it? Look closely at these pictures and video to make up your own mind. But Denna Smith, a writer in the U.S., says she knows what she saw. She believes that the circle she caught on camera floating in the sky above the Kings Dominion theme park in Virginia is a space ship. Officials at the park insisted the ring was simply smoke from the nearby Volcano ride. But Ms Smith was not buying it. The ring is well-formed and is not smoky, she pointed out. 'We were like what is that, we were all stopped and we were astonished.' Ms Smith posted her video on YouTube, where it has received nearly 300,000 hits in one week. American cable news channel CNN also picked up the story. [ Visit Website ]