Ukraine's President Zelenskyy has said that every European country that borders Russia and wants to be safe must be a member of both the EU and Nato.
One nation that now has what Ukraine wants is Finland, the most recent addition to the western alliance.
The war in Ukraine, and Nato membership, has shifted the mindset in Finland which has an 800-mile border with Russia.
The once neutral country is now fortifying its territory with miles and miles of barbed wire.
We joined military drills on Nato’s newest frontier.
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,1,Clarissa Nicholls It's been described as a “silent killer” of young, seemingly fit people. (Subscribe: https://bit.ly/C4_News_Subscribe)
The charity Cardiac Risk in the Young estimates that every week, at least 12 people aged between 14 and 35 suffer sudden cardiac death - and 1 in 300 may carry the condition.
A leading pathologist has told this programme they believe those figures are an under-estimate.
The mother of one young woman who died is campaigning for grassroots sports clubs to give young athletes - who are potentially most at risk - mandatory heart screening by specialists.
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,1,Protesters are met with tear gas and water canon fired by police, outside the US embassy in Lebanon's capital, Beirut. #beirut #lebanon #israel #palestinian #hamas #gaza #channel4news #c4news
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,1,No power or fuel, no water coming out of the taps and food running dangerously low. The UN says the humanitarian situation in Gaza was already critical and is now "fast becoming untenable". All this as the Israeli military warns it will strike Gaza City "very soon".
Time is fast running out for the 1.1 million people in northern Gaza to comply with Israel's order to evacuate. Hundreds of thousands have fled south, despite Hamas urging them to stay put.
Earlier, Israel said it was giving them safe passage along the two main roads for six hours.
There were reports that Egypt and Israel would let foreigners leave Gaza through the Rafah crossing, but it remained shut amid wrangling over a deal to allow aid in.
The Palestinian health ministry says Israeli air strikes have killed 2,215 people in Gaza - almost a third of them children and 324 in just the last day.
And 55 Palestinians have been killed in the West Bank, in clashes with Israeli troops and attacks by settlers.
More than 1,300 Israelis were killed in last weekend's brutal attack by Hamas - which is designated a terrorist group by many countries.
Israel says it's confirmed that 126 civilians are being held hostage in Gaza.
Alex has more on the day's events. You may find some of the images distressing.
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,1,Israel's multi-billion dollar Iron Wall was supposed to keep Hamas militants out. Instead Israelis were left virtually defenceless as fighters from Gaza swept through town after town killing more than 1,000 people.
By analysing footage from Hamas, Israeli civilians and CCTV, we piece together a minute-by-minute account of how the attack unfolded.
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,1,In Gaza, aid agencies are warning that overcrowded hospitals only have 3 or 4 more days worth of fuel for their generators - and without electricity, treating the thousands of injured will become almost impossible.
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With Israel's bombardment of Gaza continuing, the United Nations said that at least 340,000 Gazans have been made homeless in the last 4 days.
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,1,Ukraine's President Zelenskyy has said that every European country that borders Russia and wants to be safe must be a member of both the EU and Nato.
One nation that now has what Ukraine wants is Finland, the most recent addition to the western alliance.
The war in Ukraine, and Nato membership, has shifted the mindset in Finland which has an 800-mile border with Russia.
The once neutral country is now fortifying its territory with miles and miles of barbed wire.
We joined military drills on Nato’s newest frontier.
(Subscribe: https://bit.ly/C4_News_Subscribe)
-------
Watch more of our explainer series here - https://www.youtube.com/playlist?list=PLXjqQf1xYLQ6bu-iixvoFTVsiXQVlVniX
Get more news at our site - https://www.channel4.com/news/
Follow us:
Facebook - https://www.facebook.com/Channel4News/
Twitter - https://twitter.com/Channel4News
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