Are we not alone?

On a lighter note - Do you believe that extraterrestrial life exists? I was reading an article in The New York Times today about how the ongoing UFO program will release some of its findings. Mostly, it has to do with whether or not other countries are using aerial vehicles to fly over US military bases. It also talks about how some materials found (metals, etc.) eventually were ruled as man-made, but some they still don’t have answers for yet and fall in the “otherworldly” category.

Do you lean more toward that other countries could be far more advanced than us without us knowing.. or that in some cases there is no explanation yet because we are not alone in this universe.