The US has authorised western allies to give F-16 fighter jets to Ukraine – and endorsed the training of Ukrainian pilots to fly the warplanes.
The move by US President Joe Biden was welcomed by the UK, Netherlands, Belgium and Denmark.
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.”
But how many jets will be delivered, when and which countries will provide them?
Here Sky News takes a closer look at the F-16 fighter jets and their significance for Ukraine’s war efforts.
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0:31
US Security briefing on F-16s to Ukraine
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.
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.”
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He adds that if the West provides manned combat aircraft, then the Russian air force “most certainly wouldn’t stand a chance.”
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.
“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.
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 (1,088kg) 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 (8,935kg) without fuel and has a maximum takeoff weight of 37,500lb (17,010kg).
There is both a single-seat and two-seat model of the aircraft.
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.
Image: Zelenskyy gave Commons Speaker Sir Lindsay Hoyle a helmet during a visit to London
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.
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.”
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23:16
‘We have freedom, give us wings to protect it’
How soon could Ukraine start using them?
US officials have estimated that it could take 18 months for training and delivery of the jets.
On Monday, Emmanuel Macron said France was open to training Ukrainian pilots straight away.
London has agreed to start training pilots in the spring and said it would look at shortening the sessions for experienced Ukrainian pilots.
UK Defence Secretary Ben Wallace said on Wednesday: “This is not about gifting weapon systems.
“This is about gifting a platform. If anyone follows Formula One, you don’t just gift a car, you have to gift a pit team.”
Donald Trump’s special envoy Steve Witkoff has met Vladimir Putin for talks in Russia – as the US president called on Moscow to “get moving” with ending the war in Ukraine.
Mr Witkoff, who has been pressing the Kremlin to accept a truce, visited Mr Putin in St Petersburg after earlier meeting the Russian leader’s international co-operation envoy Kirill Dmitriev.
Mr Putin was shown on state TV greeting Mr Witkoff at the city’s presidential library at the start of the latest discussions about the search for a peace deal on Ukraine.
Before Friday’s meeting, Kremlin spokesman Dmitry Peskov played down expectations of a breakthrough and told state media the visit would not be “momentous”.
However, Sky News Moscow correspondent Ivor Bennett said he believes the meeting – Mr Witkoff’s third with Mr Putin this year – is significant as a sign of the Trump administration’s “increasing frustration at the lack of progress on peace talks”.
Earlier on Friday, Mr Trump issued his latest social media statement on trying to end the war, writing on Truth Social: “Russia has to get moving. Too many people ere [sic] DYING, thousands a week, in a terrible and senseless war – A war that should have never happened, and wouldn’t have happened, if I were President!!!”
Dialogue between the USand Russia, aimed at agreeing a ceasefire ahead of a possible peace deal to end the war, has recently appeared to have stalled over disagreements around conditions for a full pause.
Image: Mr Trump, pictured at a cabinet meeting at the White House earlier this week, has called for Russia to ‘get moving’. Pic: AP
Secondary sanctions could be imposed on countries that buy Russian oil, Mr Trump has said, if he feels Moscow is dragging its feet on a deal.
Mr Putin has said he is ready in principle to agree a full ceasefire, but argues crucial conditions have yet to be agreed – and that what he calls the root causes of the war have yet to be addressed.
The Russian president wants to dismantle Ukraine as an independent, functioning state and has demanded Kyiv recognise Moscow’s annexation of Crimea and other partly occupied areas, and pull its forces out, as well as a pledge for Ukraine to never join NATO and for the size of its army to be limited.
Zelenskyy renews support calls after attack on home city
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0:44
Children killed in strike on Zelenskyy’s home town
Speaking online at a meeting of the so-called Ramstein group of about 50 nations that provide military support to Ukraine, named after a previous meeting at America’s Ramstein air base in Germany in 2022, Mr Zelenskyy said recent Russian attacks showed Moscow was not ready to accept and implement any realistic and effective peace proposals.
Mr Zelenskyy also made his evening address to the nation, saying: “Ukraine is not just asking – we are ready to buy appropriate additional systems.”
The UK’s defence secretary, John Healy, has said this is “the critical year” for Ukraine – and has confirmed £450m in funding for a military support package.
A family of five Spanish tourists, including three children, have been killed in a helicopter crash in New York City.
A New York City Hall spokesman identified two of those killed as Agustin Escobar, a Siemens executive, and Merce Camprubi Montal – believed to be his wife, NBC News reported.
The pilot was also killed as the aircraft crashed into the Hudson River at around 3.17pm on Thursday.
New York Police commissioner Jessica Tisch said divers had recovered all those on board from the helicopter, which was upside down in the water.
“Four victims were pronounced dead on scene and two more were removed to local area hospitals, where sadly both succumbed to their injuries,” she said.
Image: The helicopter was submerged upside down in the Hudson. Pic: Reuters
Image: A crane lifted out the wreckage on Thursday evening. Pic: AP
The Spanish president Pedro Sanchez called the news “devastating”.
“An unimaginable tragedy. I share the grief of the victims’ loved ones at this heartbreaking time,” he wrote on X.
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The aircraft was on a tourist flight of Manhattan, run by the New York Helicopters company.
Witnesses described seeing the main rotor blade flying off moments before it dropped out the sky.
Image: Agustin Escobar and Merce Camprubi Montal.
Pic: Facebook
Lesly Camacho, a worker at a restaurant along the river in Hoboken, said she saw the helicopter spinning uncontrollably before it slammed into the water.
“There was a bunch of smoke coming out. It was spinning pretty fast, and it landed in the water really hard,” she said.
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0:55
Witness saw ‘parts flying off’ helicopter
Another witness said “the chopper blade flew off”.
“I don’t know what happened to the tail, but it just straight up dropped,” Avi Rakesh told Sky’s US partner, NBC News.
Video on social media showed parts of the Bell 206 helicopter tumbling through the air and landing in the river.
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1:59
New York mayor confirms six dead
Image: The crash happened near Pier 40. Pic: AP
New York Mayor Eric Adams confirmed the six deaths and said authorities believed the tourists were from Spain.
He said the flight had taken off from a downtown heliport at around 3pm.
Image: Pic: Cover Images/AP
The crash happened close to Pier 40 and the Holland tunnel, which links lower Manhattan’s Tribeca neighbourhood with Jersey City to its west.
Tracking service Flight Radar 24 published what it said was the helicopter’s route, with the aircraft appearing to be in the sky for 15 minutes before the crash.
The Federal Aviation Administration and the National Transportation Safety Board have started an investigation.
A former ballerina who spent more than a year in a Russian jail for donating £40 to a charity supporting Ukraine has returned home to the US after being freed in a prisoner exchange.
Ksenia Karelina landed at Joint Base Andrews in Maryland at around 11pm, local time, on Thursday.
A smiling Ms Karelina was greeted on the runway by her fiance, the professional boxer Chris van Heerden, and given flowers by Morgan Ortagus, President Donald Trump’s deputy special envoy to the Middle East.
Image: Ksenia Karelina arrives at Joint Base Andrews. Pic: AP
Van Heerden said in a statement he was “overjoyed to hear that the love of my life, Ksenia Karelina, is on her way home from wrongful detention in Russia.
“She has endured a nightmare for 15 months and I cannot wait to hold her. Our dog, Boots, is also eagerly awaiting her return.”
He thanked Mr Trump and his envoys, as well as prominent public figures who had championed her case, including Dana White, a friend of Mr Trump and CEO of the Ultimate Fighting Championship (UFC).
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Ms Karelina, 34, a US-Russian citizen also identified as Ksenia Khavana, was accused of treason when she was arrested in Yekaterinburg, in southwestern Russia, while visiting family in February last year.
Investigators searched her mobile phone and found she made a $51.80 (£40) donation to Razom, a charity that provides aid to Ukraine, on the first day of Russia’s invasion in 2022.
She admitted the charge at a closed trial in the city in August last year and was later jailed for 12 years, to be served in a penal colony.
At a cabinet meeting on Thursday, Mr Trump, who wants to normalise relations with Moscow, said the Kremlin “released the young ballerina and she is now out, and that was good. So we appreciate that”.
Image: Ksenia Karelina is hugged by her boyfriend, Chris van Heerden. Pic: Reuters
Russian security services accused her of “proactively” collecting money for a Ukrainian organisation that was supplying gear to Kyiv’s forces.
The First Department, a Russian rights group, said the charges stemmed from a $51.80 donation to a US charity aiding Ukraine.
Washington, which had called her case “absolutely ludicrous”, released Arthur Petrov, who it was holding on charges of smuggling sensitive microelectronics to Russia, in the prisoner swap in Abu Dhabi.
Karelina was among a growing number of Americans arrested in Russia in recent years as tensions between Moscow and Washington spiked over the war in Ukraine.
Her release is the latest in a series of high-profile prisoner exchanges Russia and the US carried out in the last three years – and the second since Mr Trump took office.
White House national security adviser Mike Waltz said members of the Trump administration “continue to work around the clock to ensure Americans detained abroad are returned home to their families”.