Wednesday 16 November 2022 08:02 AM What are NATO Articles 4 and 5 - and what does it mean if they are implemented? trends now
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As world leaders scramble to find out the details surrounding last night's missile strike on NATO member Poland, there is further uncertainty about whether the Western alliance will trigger Article 4 and 5.
The missile, which Polish authorities believe to be Russian-made, killed two people at a grain facility in Przewodow, a village in Poland located about 6km from the Ukrainian border.
Questions remain over who is responsible for the missile strike, but Poland is likely to call for a NATO meeting this morning under the treaty's Article 4 to discuss the security threat.
If it is then determined that Moscow was to blame for the blast, it could trigger NATO's principle of collective defence known as Article 5, in which an attack on one of the Western alliance's members is deemed an attack on all.
Here, MailOnline explains what NATO's Article 4 and 5 are - and what might occur if they are activated.
As world leaders scramble to find out the details surrounding last night's missile strike on NATO member Poland, there is further uncertainty about whether the Western alliance will trigger Article 4 and 5. Pictured: President Joe Biden talks during a meeting of G7 and NATO leaders in Bali, Indonesia, on Wednesday
What is Article 4 of NATO?
If any NATO member - in