chemical, biological or god forbid, nuclear weapons. >> this is basically a group of national security officials inside the administration. they're called a tiger team. they formed a version of this back in the fall when they thought russia might invade ukraine to prepare what that might look like. clearly that paid off given what's happened and four days we learned after the invasion started they authorized another version of it. this time focusing on if putin takes the extreme step of deploying chemical weapons, biological weapons, maybe even these tactical and nuclear weapons in ukraine, how does the u.s. respond to that? obviously, that's something they'd want to do in consultation with the allies here that the president is meeting with today, but they want to know, what are the options? what are we likely to do here? what would warrant potentially a military response given that's been something that president biden has said is off the table and what we're hearing is that they really looked at every aspect of this, wolf. not just maybe if there's a chemical weapons attack. what do they do if russia targets a u.s. convoy giving,