MPs have voted to allow military action to be carried out in Syria.
A big debate and vote was held in the House of Commons in Westminster on Wednesday.
The MPs voted in favour of carrying out airstrikes in Syria, against the terrorist group that calls themselves the Islamic State.
If you have any questions or are feeling a little bit worried about the MPs' decision and what this means for the rest of the UK - we are asking a BBC defence expert to try to answer as many of your questions as possible.
If you would like to know more about what is happening in Syria check out our guide here.
Or if anything in the news upsets you, take a look at our special guide to help.
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