While it no longer controls vast swathes of Iraq and Syria, Islamic State remains a threat and will seek to spring 10,000 of its fighters from Syrian prisons in 2023, experts say.
The infamous terror group is much diminished from its peak in 2014 but it remains a menace in a volatile part of the Middle East, as well as abroad in Afghanistan and parts of Africa.
What is more, there are fears that a possible ground offensive by Turkey in Syria could create the perfect conditions for IS to once again seize power.
“Blink and you’ll miss it and suddenly ISIS will be back,” says Middle East expert Dr Shiraz Maher.
In a year where other stories have dominated the headlines, Sky News looks into what IS has been doing, and whether huge tracts of territory could once again fall under its flag.
He said: “But the level of threat, the level of operational activity, has stayed reasonably consistent over that kind of period.
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“In various key theatres the group has maintained a steady tempo of insurgent violence.”
Mr Henman, who works for the Janes intelligence agency, said the group and its affiliates further afield are focused on exploiting regional instabilities and still have designs on seizing territory.
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Seeking to seize territory in parts of Africa
Several branches, or provinces, of IS exist across the Middle East and Africa. Each has its own regional leader who then pledges allegiance to the overall IS leader.
At its height the so-called IS caliphate held sway over about a third of Syria and 40% of Iraq – a territory larger than Iceland.
In recent years much of the groups focus has turned to west Africa, Mr Henman says, where it has been met with multinational taskforces seeking to stop it gaining a proper foothold.
In Afghanistan the group’s regional affiliate – known as the Islamic State in Khorasan Province – has increased its attacks since the Taliban regained power.
Earlier this month, China advised its citizens to leave the country following a co-ordinated attack by Islamic State militants on a Chinese-owned hotel in the heart of Kabul.
But the danger of IS activity in Iraq and Syria remains, despite its diminished presence.
Some 70,000 people with suspected links to the group, including women and children and around 10,000 IS militants, are being held by Kurdish forces in north east Syria.
Dr Shiraz Maher, a senior lecturer at King’s College London, says the risk of IS freeing thousands of imprisoned fighters is the “single greatest security threat to the West”.
He told Sky News: “The Syrian Democratic Forces have repeatedly said that this is a ticking time bomb that they are sitting on (that) they are not capable of dealing with themselves alone.”
Many of those being held by SDF forces are foreign fighters, but many nations have been reluctant to deal with them.
The delicate situation could be put at risk if Turkey carries out its threat of a land invasion targeting Kurdish forces, Dr Maher warned.
Such a development may force Kurdish authorities to divert resources currently guarding its network of detention centres to the front line, creating a “massive ability” for IS to free its supporters.
“We need to think creatively and have some courage in dealing with this issue and nipping it in the bud right now,” Dr Maher said.
“If ISIS return to Syria and Iraq, people will die on the streets of Berlin, London and Madrid.”
An 18-month-old boy and his 10-year-old sister are among 25 people who were killed in a series of Israeli strikes on central parts of Gaza, hospital officials have said.
Sixteen people were initially reported to have been killed in two strikes on the central Nuseirat refugee camp on Thursday, but officials from the Al Aqsa hospital said bodies continued to be brought in.
The hospital said they had received 21 bodies from the strikes, including some transferred from the Awda hospital, where they had been taken the day before.
Strikes on a motorcycle in Zuwaida and on a house in Deir al Balah on Friday killed four more, hospital officials said, bringing the overall toll to 25.
Five children and seven women are among those who have been confirmed dead.
The mother of the 18-month-old boy is missing and his father was killed in an Israeli strike four months ago, the family has said.
The Palestinian news agency WAFA earlier reported that 57 people had died in the Israeli strikes.
The Israeli military did not comment on the specific strikes but said its troops had identified and eliminated “several armed terrorists” in central Gaza.
It also said its forces had eliminated “dozens of terrorists” in raids in northern Gaza’s Jabalia area – home to one of the territory’s refugee camps.
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It comes as the Israeli military said on Friday it killed senior Hamas official Izz al Din Kassab, describing him as one of the last high-ranking members, in an airstrike in Khan Younis.
The Israel Defence Forces (IDF) have over the past few weeks resumed intense operations in the north of Gaza, claiming they are seeking to stop Hamas, the militant group ruling Gaza, from regrouping.
Meanwhile, top UN officials said in a statement on Friday that the situation in northern Gaza is “apocalyptic” and the entire Palestinian population in the area is at “imminent risk of dying from disease, famine and violence”.
The overall number of people killed in Gaza in the 13-month war is more than 43,000, officials from the Hamas-run health ministry in the territory, who do not distinguish between civilians and combatants, reported this week.
It comes as at least 41 people were killed in Israeli strikes on Lebanon’s Baalbek region on Friday, the regional governor said.
The deaths were confirmed hours after Lebanon’s health ministry said 30 people had been killed in Israeli strikes on the country in the past 24 hours.
It is not clear if any of those killed in the Baalbek region were included in that figure.
In recent days, Israel has intensified its airstrikes on the northeast city of Baalbek and nearby villages, as well as different parts of southern Lebanon, prompting roughly 60,000 people to flee their homes, according to Hussein Haj Hassan, a Lebanese official representing the region.
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Israel has issued evacuation orders for people living in parts of Lebanon
Israel’s military said in a statement that attacks “in the area of Beirut” had targeted Hezbollah weapons manufacturing sites, command centres and other infrastructure.
Israeli planes also pounded Beirut’s southern suburb of Dahiyeh overnight, destroying dozens of buildings in several neighbourhoods, according to the Lebanese state news agency.
More than 2,800 people have been killed and 13,000 wounded since fighting between Israel and Hezbollah escalated after Hamas’s 7 October attack last year, Lebanon’s Health Ministry said.
Meanwhile, in northern Israel, seven people, including three Israelis and four Thai nationals, were killed by projectiles fired from Lebanon on Thursday, Israeli medics said.
North Korea says it will support Russia in its war with Ukraine “until the day of victory” – after the US warned thousands of Pyongyang’s troops are set to enter combat in the coming days.
North Korea’s foreign minister Choe Son Hui hailed Vladimir Putin’s “wise leadership” ahead of talks in Moscow on Friday, and insisted that Russia will “achieve a great victory”.
“We also assure that until the day of victory we will firmly stand alongside our Russian comrades,” she added.
US secretary of state Antony Blinken has said thousands of North Korean troops are stationed near Ukraine’s border and are set to enter combat in the coming days.
Mr Blinken said 10,000 soldiers have been deployed to Russia, with up to 8,000 in the Kursk border region, and indicated they would be used on the frontline.
He added that the troops have been trained by Russian forces in artillery, drones and “basic infantry operations, including trench clearing”.
In an interview with South Korean TV channel KBS, Ukrainian President Volodymyr Zelenskyy condemned the West’s response to the deployment as “nothing, it’s zero”.
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North Korean troops near Ukraine border, US says
Russia’s foreign minister Sergei Lavrov told reporters on Friday that he had “nothing to add to what has already been said” on the US claims, and thanked Ms Choe for North Korea’s support.
A mutual defence pact was agreed during their summit, meaning the countries will help each other if they are attacked.
Speaking in Moscow, Ms Choe accused the US and South Korea of plotting a nuclear strike against her country.
She provided no evidence to back her claim, but spoke of regular consultations between Washington and Seoul, at which she alleged such plotting took place.
More than 200 people have died in Spain after nearly a year’s worth of rain fell in a matter of hours.
On Friday, there were at least 205 confirmed deaths in Valencia, two in Castilla La Mancha, and one in Andalusia.
Local authorities issued warnings late on Tuesday, but many say this gave them next-to-no time to prepare for the conditions that had killed dozens by Wednesday.
Here we look at what caused the flooding – and why they could happen again.
How quickly did the floods hit?
Heavy rain had already begun in parts of southern Spain on Monday.
In contrast to areas like Malaga, where residents told Sky News it had been “chucking it down for two days”, the rain did not start in the worst-hit region of Valencia until around 7pm on Tuesday.
At 8pm, people in Valencia received smartphone alerts warning them not to leave their homes.
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But by then, many were already trapped in dangerous conditions, particularly in the south of the city where a major road had flooded, leaving drivers stuck in their cars.
By Wednesday morning, more than 50 people had been found dead.
The Chiva area of Valencia had been hit by 491 litres per square metre of rain in eight hours. Only around 65 l/m2 usually falls in the whole of October.
Storms spread west on Wednesday night and into Thursday, bringing deadly conditions to Andalusia and Castilla La Mancha as well.
What caused them?
Heavy rain is not uncommon across eastern Spain at this time of year.
It’s caused by a weather phenomenon called DANA – ‘depresion aislada en niveles altos’ in Spanish – which translates as ‘isolated low-pressure system at high levels’.
DANA occurs when:
1) Cold air from the north moves south;
2) Warm air then blows over the Mediterranean, rising quickly and forming heavy clouds;
3) The low pressure from the north gets blocked by the high pressure above the water, causing it to slow down or stop completely.
This creates storm-like conditions that cannot move anywhere else – so the rain falls over the same area for a sustained period of time.
What role did climate change play?
General flash floods and those caused by DANA specifically have struck Spain long before humans started warming the climate.
But climate change is making heavy rain worse, and therefore more dangerous.
That’s because hotter air is able to hold more moisture. So when it rains, it unleashes more water.
The current 1.3C increase in global temperatures since pre-industrial times means the air can carry about 9% more moisture.
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What caused the floods in Spain?
And higher sea surface temperatures in the Mediterranean are a “key driver” of strong storms, said Dr Marilena Oltmanns, research scientist at the National Oceanography Centre in Southampton.
The world is on track for 3.1C warming by the end of this century, which is expected to make rain heavier still, increasing the chances of flash flooding and giving areas little time to respond.
Imperial College London’s lead for its World Weather Attribution (WWA) group Dr Friederike Otto says there is “no doubt about it”.
“These explosive downpours were intensified by climate change,” she says.
Professor Mark Smith, an expert in water science and health at the University of Leeds, adds that hotter summers also dry out the soil in the ground, which means it absorbs less rain – and more of it flows into rivers and lakes – which flood quicker.
Will they keep happening?
A red weather warning is in place for the Huelva area of Andalusia until Friday afternoon.
Beyond the warning period, storms are set to continue across parts of Spain for several days.
In the longer term, Dr Marilena Oltmanns says: “Given the long-term warming trend, both in the sea surface temperatures in the Mediterranean region and the global air temperature, we expect the events like the currently observed one in Spain to become more frequent.”
Chiva and the surrounding worst-hit area also suffers from the unfortunate geography of being in a river catchment – where water feeds into the River Turia – and close to the mountains. And is not far from the sea.
That means water has little chance to absorb into the land and so builds up very quickly.
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This makes it all the more imperative that forecasts are accurate, authorities prepare accordingly, and residents respond quickly.
Professor Hannah Cloke, professor of Hydrology at the University of Reading, describes people dying in their cars and being swept away in the street as “entirely avoidable”.
“This suggests the system for alerting people to the dangers of floods in Valencia has failed,” she says.
“People need to understand that extreme weather warnings for floods are very different from regular weather reports. We need to consider flood warnings totally differently, more like fire alarms or earthquake sirens, and less like the way we browse daily weather forecasts on our phones or on the TV.”
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Residents: ‘No one came to rescue us’
Gareth Redmond-King, international analyst at the Energy & Climate Intelligence Unit (ECIU), says Spain’s tragedy should serve as a “wake-up call” to the UK.
“This is not about future events in a far-off place with a dramatically different climate from the UK. Spain is one of our nearest neighbours,” he warns.