it could be a structured rotational presence. making sure there's the biggest u.s. presence there. the expense is the u.s. could build another base. a traditional military base in eastern europe to sure up the eastern flank of nato. again, these are options being considered. what the pentagon has drawn up as possibilities for biden but he will discuss these with nato allies. there's other options as well. f for example, exercises that are frequent, larger in scale. a bigger cyber presence. there's a number of possibilities on the table here. u.s. ambassador to nato said nothing is off the table and they are looking for new ideas to flush them out, to discuss them. one of thoem se ideas was a nat peace keeping deal for ukraine. it's worth remembering that before russia's invasion of ukraine, the u.s. had some