our brussels bureau chief alexandra von nahmen is in warsaw where u.s. esident biden gave his speech earlier, and dw's ines pohl is covering it from washington, d.c. i began by asking alexandra if president biden's speech resolved any doubt for u.s. support for ukraine. alexandra: yes, i would say so. and i think this was biden's main message here, a message that went down well with his polish audience and with europeans in general, i would say. the u.s. president emphasized here that knowing what you stand for is important but knowing who you are standing with makes all the difference. and he spoke about nato and the u.s. commitment to nato's article five, an article that states clearly that an attack against one ally is considered an attack against all allies. and that was, of course, what his polish audience wanted to hear. and many people there at the castle told me that they were waiting for these words. brent: ines, let me ask you, how you see it from the other side of the atlantic. what would you say was the biggest takeaway from biden's speech tod