Judy Woodruff:
Exploring the — officials are exploring the possibility that the explosion was caused by a Ukrainian air defense missile, but Ukrainians deny that.
And, late today, Poland invoked Article 4 of the NATO Treaty, asking for a meeting of the alliance to discuss a possible attack on a member state.
For more on all of this, we turn to Ivo Daalder. He served as U.S. ambassador to NATO during the Obama administration. He's now the president of the Chicago Council on Global Affairs.
Ivo Daalder, welcome back to the "NewsHour."
What do you make of everything you have heard so far tonight?
Ivo Daalder, Former U.S. Ambassador to NATO: Well, in war, you live in a fog, and we need to find all the information that we possibly can.
The latest reports is that the Polish foreign minister has said that it was indeed a Russian missile. There were earlier reports that it might have been an air defense missile that the Ukrainians were shooting. They were defending their territory. There were almost 100 missiles that the Russians shot at civilian locations in Ukraine.
So we need to have some sense of whether this was a deliberate attack against NATO territory or whether it was a stray missile. But it also shows that we're in a very, very dangerous situation.
Poland invoking Article 4, which is an article that says we need to consult if one of the members has a — perceives a threat to their security, is exactly the right thing to do. The meeting will take place tomorrow morning in Brussels. They will start talking about, what are the facts, what do we know, and then how would we respond?
ncG1vNJzZmivp6x7sa7SZ6arn1%2Bjsri%2Fx6isq2ejnby4e8OemJ2kqWKyubzLqKqip55iv6a8zqurnpxdnrtuvM6lmKecXZbAbr7UrKqimV2qu62xwKyfnpxdora0v8ilnGaakae%2ForPEZqanZaWgv6K1zZ4%3D