6-yo boy Falcon Heene—who allegedly was flying uncontrollably inside a homemade spaceship-shaped helium balloon, now landed—has not been found yet. Colorado police are searching for him now. [Update: Boy was safe, hiding at home. ]
Authorities are trying to rescue the balloon but there's no much they can do about it, as the UFO is flying without control over northeastern Colorado, pushed by 15 to 20mph southwest wind. According to Eloise Campanella, Larimer County Sheriff's Officer spokeswoman, "the device could rise to 10,000 feet." At that altitude, temperature is very low and there's little air to breathe.
The balloon was made with helium balloons and tinfoil by his father, Richard Heene (who is quite a weird character, as you can see in the video of him trying to prove life in Mars). Hopefully things won't end dramatically this time, and we will see a happy ending so the people at Pixar can make a follow up to Up!.