Related Clues:

• Strange objects visible to all, loud and huge
• Buffoons regularly identify alien craft
• Alleged visitors
• Blurry craft in tabloid pics
• Iditarod conveyances
• Subjects of a top-secret government cover-up, some believe
• They may come up from boundaries of Uranus
• Gravity-powered toys
• Snowy 10-Across sights
• Hover craft?
• These recalled lots of unsolved cases?
• Craft some try to reverse-engineer, in the movies
• Mysterious objects
• More downhill racers
• They're seen on Currier and Ives' ''Winter Pastime''