Many have underestimated the americans in the past.
"Many have underestimated the americans in the past."
Indeed.
We have one item that is far beyond anything found in the aforementioned list. I don't know it's name, or the full extent of its capabilities, but I do know what I've seen it do with my own eyes. It can fly silently, at near-hovering speeds. By near-hovering speeds, I am talking about 1mph or slower, and by silently, I mean it is absolutely silent. It's about the size of a stealth fighter, perhaps a bit smaller, and has a rounded heart-shaped form factor, with a small cabin on top, and a notch in the rear, with no vertical control surfaces. It can also accelerate at a good clip, again, in absolute silence.
We've had this thing for at least six years.