There are a ton of planes that have fallen into the sea, since planes were first put on ships. The one you’re talking about fell off a flight deck, not fell out of the sky. There was a B2 bomber that crashed, too. That happened on US soil. Embarrassing.
The US has the Mach 20 AGM-183A. They also have laser weapons and the NGAD fighter already in the sky. They had the Predator drone in use in the Gulf War in the 90s, but revealed it to the public in the 2000s and retired it by 2018.
Everything I’ve said is freely available on Wikipedia.