use signer mechanisms on critical infrastructure. you could count in that our lector call mechanisms, you could count the power grid, our financial infrastructure and military systems that now defend on networked capabilities. the other thing that's essentially constant signer probing, espionage, gathering of illicit information, which isn't per se an attack. when it comes to the former, direct attacks on critical infrastructure, there's not really a kind of beat the russians at their own game solution. this is something where at the end of the day, and we've known this for decades going back to the cold war, you've got to have basic rules of the game. if you do this, we're going to do this back to you, so we're going to deter one another and have rules about what's acceptable and not. when it comes to the other, this is a new reality. this is simply a new technology, with which we're going live and defend ourselves.