biden hold back on the sanctions today. he did not rule out the most aggressive and punishing sanctions that the u.s. could impose on russia. he has said if russia continues to advance continues to accelerate, this movement into ukraine, this invasion as he put it, the sanctions will continue from the u.s., and of course from western allies as well. but biden is leaving open the hope, the glimmer of some sort of diplomacy here in the hours ahead. >> so admiral, what do you see in terms of that continuing advanced? what are you looking for? what should we watch for in terms of any military action in the coming days? >> i would watch for cyber and cyberattacks, particularly those directed at the overall ukrainian grid, as well as ukrainian command and control. putin will want to degrade the ability of kyiv to control those forces that are in the field. number two, i would watch for