A common response in the recent LessWrong threads about UFO's is rationalists immediately going into a state of wanting to translate the news into probabilities of the existence of aliens instead of taking the facts for what they are and thinking about what should happen based on the revealed facts.
According to Ross Coulthart, David Grusch gave the ICIG, Congress and the Senate, the location where the vehicles are stored and the names of the people who control access to those programs.
While I would like to know whether or not aliens visited earth, I think it's more useful to simply take the stance "I don't know" instead of thinking in terms of probability.
From the "I don't know"-stance, the next step is obvious: There need to be congressional hearings where the people who were named has being in control of access to those programs get asked in public about the nature of those programs.
Given that there seem to be powerful people in the intelligence community who want to block public exposure of whatever the nature of those programs are, it's important that there's public pressure on Congress to investigate and hold public hearings that go into the details.
The mental moves of directly rounding down to "my priors against aliens are high" -> "no aliens" -> "no need to do anything" is bad as if enough people hold it we won't get more evidence.
This might not be possible until the danger of arms-races in agentic AI has become more obvious. I'm not familiar enough with the nuclear situation to say whether it's feasible today, but it probably will be at some point in the near future.
It seems probable to me that monitoring has, over the past 40 years, become a lot cheaper and more feasible than our geopolitical institutions recognize.
Increases in mutual transparency may have to come in train with assurances that the balance of power will be preserved in light of whatever's discovered. Geopolitical pluralism may turn out to depend on mutual uncertainty about who would win a war. With increases in transparency, there's a risk that this veil falls away, which is good for the victor, but so terrible for everyone else, that the veil must not be threatened without such assurances.