The US has approved sending F-16 fighter jets to Ukraine to enhance the country’s air defence in the wake of a barrage of Russian missiles.
But how many will be delivered, and which countries will provide them?
US President Joe Biden authorised Western allies to give advanced F-16 fighter jets – a move the UK, Netherlands, Belgium and Denmark have welcomed.
On Friday, Prime Minister Rishi Sunak tweeted: “The UK will work together with the USA and the Netherlands, Belgium and Denmark to get Ukraine the combat air capability it needs. We stand united.”
Here’ Sky News takes a closer look at the F-16 fighter jets and their significance.
Why would F-16s be so important for the war?
Sky News’ military analyst Sean Bell says that although Russia has more tanks and aircraft, the people of Ukraine are proving tenacious and courageous on the battlefield.
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Image: This satellite image provided by MaxarTechnologies shows the demolished university buildings and the radio tower in Bakhmut, Ukraine. Pic:AP
Ukraine has gained confidence with the West providing more support and longer-range weapons. However, at the moment, Mr Bell said Zelenskyy has been asking for the capability for the past year, adding “fighter aircraft are the one thing that he can’t match Russia with.”
He adds that if the west provides manned combat aircraft, then the Russian air force “most certainly wouldn’t stand a chance.”
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The F-16s hold significance in supporting Ukrainians in the war, but Mr Bell says it might take months or even years for military troops to learn how to operate the aircraft.
He said: “So this is not something unlike most of the narratives in the west, by just giving equipment.
“This is about giving capability. And Zelenskyy has been banging the drum up until now.
“The west has been reluctant to do that because they know it will take time, but it would prove a very decisive capability in this conflict.”
What are the F-16s?
The F-16 is built by the American defence contractor Lockheed Martin.
Image: A General Dynamics F-16A Fighting Falcon fighter jet, belonging to the Royal Netherlands Air Force
It is a multi-role fighter aircraft created for the United States Air Force.
The F-16 has an internal M61 Vulcan cannon and 11 locations for mounting weapons and other equipment.
Its payload typically consists of two 2,000lb (907kg) bombs, two AIM-9 Sidewinder short-range air-to-air missiles, two AIM-120 medium-range air-to-air missiles and two 2,400lb (1088kg) external fuel tanks.
The jet can travel at speeds up to 1,500mph and has a range of more than 2,002 miles.
It has a wingspan of 32ft 8in (9.9m) and a length of 49ft 5in (13.8m). It weighs 19,700lb (8935kg) without fuel and has a maximum takeoff weight of 37,500lb (17010kg).
There is both a single-seat and two-seat model of the aircraft.
Image: A US-made F-16 fighter jet drops flares during the annual Han Kuang No. 22 Military Exercise in 2006.
In 1991, during the Gulf War, F-16s were used to attack airfields, military production facilities and other targets.
It has also been used and flown in American conflicts in Afghanistan, Iraq, Kosovo and the Persian Gulf.
They are operated by several countries other than the US, including Poland, Belgium, the Netherlands, and Denmark.
When can F-16s be realistically delivered?
There are two key factors to think about.
As F-16s are produced by the US, the Americans would need to provide permission to other nations to give their F-16 aircraft.
“The second thing is F-16s are the most widely exported aircraft in the world as there are a lot of them about,” Bell adds.
There are two factors to consider for the F-16s plan to fall into place.
First, training must take place to ensure pilots can fly the aircraft.
And second, it’s important to think about how the F-16s will actually be delivered.
Bell added: “Although there’s lots of countries operating them because it’s so expensive, nobody has more aircraft than they need, and nobody could afford to give to 20 to 30 of these platforms to Ukraine.”
Which countries could provide F-16s?
At the moment, there are around 25 countries that currently operate the F-16.
Image: A Turkish Air Force F16 fighter jet makes a landing approach at the Incirlik Air Base, Turkey in 2013. AP
The fighter jets come at a high price, and Bell says that although many countries have them, “none of them have spare aircraft.”
He adds: “They’re just too expensive. You generally buy what you can afford and that’s not enough for everything you want to have them for.
“So none of the nations will be able to get rid of excess jets. But I suspect what will happen is that they will need to focus on a commonality of jets.
“So who operates a certain block and a certain age of aircraft and see whether there is some shuffling behind the scenes that different countries can give each other aircraft so that you get a common aircraft that comes to Ukraine.”
Sir Keir Starmer will join other European leaders in Kyiv on Saturday for talks on the “coalition of the willing”.
The prime minister is attending the event alongside French President Emmanuel Macron, recently-elected German Chancellor Friedrich Merz and Polish Prime Minister Donald Tusk.
It will be the first time the leaders of the four countries will travel to Ukraine at the same time – on board a train to Kyiv – with their meeting hosted by President Volodymyr Zelenskyy.
Image: Sir Keir Starmer, Emmanuel Macron and Friedrich Merz travelling in the saloon car of a special train to Kiev. Pic: Reuters
Military officers from around 30 countries have been involved in drawing up plans for the coalition, which would provide a peacekeeping force in the event of a ceasefire being agreed between Russia and Ukraine.
Ahead of the meeting on Saturday, Sir Keir, Mr Macron, Mr Tusk and Mr Merz released a joint statement voicing support for Ukraine and calling on Russia to agree to a 30-day ceasefire.
Image: Sir Keir and Volodymyr Zelenskyy during a meeting in March. Pic: AP
“We reiterate our backing for President Trump’s calls for a peace deal and call on Russia to stop obstructing efforts to secure an enduring peace,” they said.
“Alongside the US, we call on Russia to agree a full and unconditional 30-day ceasefire to create the space for talks on a just and lasting peace.”
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The leaders said they were “ready to support peace talks as soon as possible”.
But they warned that they would continue to “ratchet up pressure on Russia’s war machine” until Moscow agrees to a lasting ceasefire.
“We are clear the bloodshed must end, Russia must stop its illegal invasion, and Ukraine must be able to prosper as a safe, secure and sovereign nation within its internationally recognised borders for generations to come,” their statement added.
“We will continue to increase our support for Ukraine.”
The European leaders are set to visit the Maidan, a central square in Ukraine’s capital where flags represent those who died in the war.
They are also expected to host a virtual meeting for other leaders in the “coalition of the willing” to update them on progress towards a peacekeeping force.
This force “would help regenerate Ukraine’s armed forces after any peace deal and strengthen confidence in any future peace”, according to Number 10.
Ten explosions have been heard near Srinagar International Airport in India-administered parts of Kashmir, officials have told Reuters news agency.
The blasts followed blackouts caused by multiple projectiles, which were seen in the sky above the city of Jammu earlier on Friday.
Explosions were also heard in the Sikh holy city of Amritsar, in the neighbouring Punjab state, according to Reuters.
An Indian military official told the agency that “drones have been sighted” and “they are being engaged”.
It comes as tensions between Indiaand Pakistanacross the line of control around the region of Kashmirhave boiled over this week, leading to fears of a wider conflict.
On Wednesday morning, Indiacarried out missile strikes in Pakistan and Pakistan-administered parts of the disputed region.
The government in India said it hit nine “terrorist infrastructure” sites, while Pakistan said it was not involved in the April attack and the sites were not militant bases.
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Around 48 people have been killed since Wednesday, according to casualty estimates on both sides – which have not been independently verified.
India also suspended its top cricket tournament, the Indian Premier League, as a result of rising tensions, while the Pakistan Super League moved the remainder of its season to the United Arab Emirates.
Meanwhile, White House press secretary Karoline Leavitt said at a conference on Friday that the US is in constant contact with both India and Pakistan.
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Conclaves are famously unpredictable affairs – and once again the election of Cardinal Robert Francis Prevost as the new pope caught many by surprise.
The newly elected Pope Leo XIV won the consensus of the 133 cardinal electors after only four ballots – a fast process for a diverse college of cardinals.
Though his name had circulated among some Vatican watchers, other cardinals had emerged as clear front-runners, including Pietro Parolin – the Vatican’s number two who would have been the first Italian in almost 50 years to become pontiff – or Luis Tagle, a Filipino cardinal looking to become the first Asian pope.
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Instead, it was the first North American to win the highly secretive process.
So, what went on behind the closed doors of the Sistine Chapel?
Until Thursday lunchtime, Cardinal Parolin was ahead, gathering between 45 and 55 votes, sources say.
A substantial number, but well short of the 89 votes he needed for a two-thirds majority.
At this point, Cardinal Prevost had between 34 and 44 votes.
But as the Italian struggled to grow his support during the first three rounds of voting, he stepped down from the race, endorsing Prevost instead, Sky News understands.
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An internal battle between Luis Tagle and Pablo Virgilio David – both cardinals hailing from Asia – cancelled out both of their chances.
And a contender from Africa – the most conservative sector of the church – was never likely for a conclave where the overwhelming majority of cardinals had been appointed by Francis, a progressive pontiff, sources say.
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An American pope has long been seen as highly improbable, given the geopolitical power of the US.
But Cardinal Prevost was able to draw from across the groups making up the electors: moderate US cardinals, South American cardinals and many European cardinals all coalesced around him.
Italian newspaper La Repubblica said Prevost “certainly attracted cross-party preferences, both ideologically and geographically”.
“In the conclave he was the least American of Americans: Born in Chicago, he lived 20 years in Peru,” the newspaper said.
It added: “As a man used to teamwork, Prevost appeared to many as the right man to make the papacy evolve into a more collegial form.”