Timing like this isn't an accident. Here are three possible meanings, I wonder if there are more:

1. A message from Ukraine to the US that "we are competent and capable. Invest in us"
2. A message from US to Russia that "we still have lethal intelligence capabilities within your borders that you are unaware of and we can use them against your most defended people. You need to behave."
3. A message from Russia to the US that "whenever you develop an intelligence asset within our sphere of influence, we will know about it and we will neutralize it. You have no leverage here."