i don't think the chinese, i don't think they want to get sucked into this. they wouldn't mind helping russia on the financial side because they have an advantage to breaking up the western-led economic order of the world. militarily they'll be cautious. if they were to become more involved, that would be one more element of internationalization of this. putin has already used the territory of belarus, and i would not at all be surprised to see he ends up hitting nato forces even by accident as we're supplying the ukrainians and he's trying to knock out those supplies. >> you're aware of the public debate right now about the level of u.s. military assistance for ukraine. you're sending a whole host of weapons that have had an impact on the battlefield but have taken a no-fly zone off the table, also sending these mig 29s from poland to ukraine. do you believe there should be more aggressive u.s. military assistance, and to what degree