Russia has recently been the target of attacks during the presidential campaign with the Democrats especially doing some major sabre rattling. On the Republican side, Mike Pence has also been harsh but Donald Trump has not been. One of the major issues in the campaign has been the threat of cyberwarfare and outrage that other countries would dare hack into US systems.
So the recent news report about the arrest of an NSA contractor who worked fro Booz Allen should be embarrassing but will likely be ignored.
Details of the arrest were first reported by the New York Times, which suggested the breach involved the possible theft of highly classified computer codes developed to hack into the networks of foreign governments.
It should not be surprising that the US government has been hacking other governments since it feels that it has the right to spy on pretty much everyone. So the significance of this news is that once again, that the US feels that it can do what it wants to other countries while righteously condemning other countries when they do the same thing to the US.