Arizona UFO cover up?

(AP) -- So, what was up over the skies of Arizona the other day? So many people were asking that the Feds had to come up with an answer.

The Federal Aviation Administration says it got calls all afternoon Monday [5/18/09] about an object seen overhead from Scottsdale to Sedona. A spokesman for the FAA says the object in question didn't show up on radar and was likely a balloon.

Eventually, the Columbia Scien-tific Balloon Facility in Pales-tine, Texas identified the ob-ject as a 4,000-pound research balloon. It was released by a NASA organization to measure gamma ray emissions in high altitudes. One person who saw the object in the sky said it looked "like the gigantic bubble from the Wizard of Oz."

PHOTO: Red Rocks, the sky over Arizona (Wiki); top-secret USAF craft, "weather balloon," mass delusion? A government explanation to deflect any sighting (Pravda.ru).