Always wondered, what other things would they investigate? Certain other kinds of research that aren’t as ‘flashy’ as nuclear stuff? Multinational oligarchs? Systemically engineered mass murder events?
I never really considered it, mostly due to our current limitations around fusion. If anywhere would have a sighting due to that, it’d likely be National Ignition Facility in Livermore, CA. That facility, a part of Lawrence Livermore National Laboratory, is the first to have break even on energy creating fusion.
I searched and couldn’t find any sightings directly attributed to the area around the labs. LLNL comes up a little in search regarding UAP research, but I haven’t jumped in that rabbit hole. However, they are near the California coast which does get a lot of sightings reported.
Extending the scope a bit, the sun gets a fair share of sightings. That could just be due to the fact that it’s constantly observed. The scale of object size compared to the sun and differentiating from objects drifting through space makes those sightings tricky to determine.