LONDON — The Olympic opening ceremony was watched by around a billion people around the world… but were there spectators from even further afield? As fireworks and light displays lit up the sky above the Olympic Stadium on Friday night, a UFO was spotted hovering above the action. The saucer-shaped, metallic object has set tongues wagging after it was caught on camera as the ceremony drew to a close around 12.30 A.M. The appearance of the object has excited alien hunters, and only weeks ago one of the UK's top UFO experts predicted that mass summer events would be an optimum time for spacecraft to reveal themselves to humans. He told the Daily Mail: “It has been a widely held belief in Ministry of Defense circles that ‘aliens' have been able to detect us for decades via TV and radio broadcasts. “What once seemed like science fiction is steadily being realised by central governing bodies as distinctly real. “If aliens have studied our psychology, they may choose to appear in our skies on a significant date. — Agencies