Joe Biden has promised the US will “respond” to the attack on Tower 22, which left three US military personnel dead and dozens wounded.
The problem is that the US has already been responding to attack after attack on its bases in the Middle East – and has nevertheless failed to deter them.
And the US has retaliated to those – the graphic below shows their attacks since 27 October.
They already include strikes against bases operated by the Iranian Revolutionary Guard Corps (IRGC) – the regime’s most powerful military force – rather than proxy militias.
Defence and security analyst Professor Michael Clarke said: “What the Americans were trying to do was be very graduated in their response – always to respond to individual attacks with another retaliation on the place where the attack came from.
“The Americans now have got to decide if they need to take a step up in terms of their response.”
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Would a response that included sanctions or perhaps a cyberattack really be a step up?
Many Iranian officials are already under sanctions and there is domestic pressure on Mr Biden to go further.
Professor Clarke suggests that another option would be to target Iranian ships in the Red Sea and connecting waters: “The Americans might regard that as a sensible target since they’re all part of the Iran’s attempts to create a crisis for America.”
IRGC fast boats operate regularly in the Strait of Hormuz and have seized oil tankers in the past.
Earlier this month, Iran also announced that its warship Alborz, a frigate, had entered the Red Sea.
There’s also the Behshad.
The ship officially carries cargo but military analysts say it carries out surveillance that has been vital for all the Houthi attacks – another Iranian-backed militia that forms part of the same so-called “axis of resistance”.
Those would be Iranian assets, but still outside Iran. Further up the escalation ladder would be an attack on Iranian territory itself.
That could be limited to the coast, perhaps. Or they could strike the interior – perhaps even on nuclear facilities.
That is the very top of the ladder – and the US would not start there, if only to give itself room to climb in the future.
On Monday, Iran’s foreign ministry spokesperson Nasser Kanaani said that his country “does not welcome the expansion of conflicts in the region”.
And Mr Biden said on Tuesday that “we don’t need a wider war in the Middle East” but he had decided on an unspecified response.
Others would argue that, with the death of US military personnel, the wider war is already here.
Donald Trump’s Middle East envoy has met Israel’s prime minister in an effort to secure a ceasefire deal in Gaza before the president-elect takes office on 20 January.
Benjamin Netanyahu’s office confirmed details of the meeting with Steve Witkoff on Saturday, adding that the head of the Israeli Mossad intelligence agency has been deployed to Qatar in order to “advance” talks.
It was not immediately clear when David Barnea would travel to Doha for the latest round of indirect discussions between Israel and Hamas.
Earlier on Saturday, an Israeli official said some progress had been made, mediated by Egypt, Qatar and the United States, to reach a deal in Gaza.
The mediators are making renewed efforts to halt fighting in Gaza and free the remaining Israeli hostages held there before Mr Trump takes office.
A deal would also involve the release of some Palestinian prisoners held in Israeli jails.
Families of Israeli hostages welcomed Mr Netanyahu’s decision to dispatch the officials, with the Hostages and Missing Families Forum Headquarters describing it as a “historic opportunity”.
Mr Witkoff arrived in Doha on Friday and met the Qatari Prime Minister Sheikh Mohammed bin Abdulrahman Al Thani, Qatar’s foreign ministry said.
Egyptian and Qatari mediators received reassurances from Mr Witkoff that the US would continue to work towards a fair deal to end the war soon, Egyptian security sources said, though no further details were released.
Israel launched its assault on Gaza after Hamas fighters stormed across its borders in October 2023, killing 1,200 people and taking more than 250 hostages, according to Israeli figures.
Families of the roughly 100 hostages still held in Gaza are pressing Mr Netanyahu to reach a deal to bring their loved ones home.
Since then, more than 46,000 people have been killed in Gaza, according to Palestinian health officials, with much of the area destroyed and gripped by a humanitarian crisis, with most of its population displaced.
Pope Francis has been honoured with America’s highest civilian award by President Joe Biden, who has described the pontiff as “a light of faith, hope, and love that shines brightly across the world”.
It is the first time Mr Biden, 82, has given the Presidential Medal of Freedom with Distinction during his four years in office.
In a statement, the White House said the award is “presented to individuals who have made exemplary contributions to the prosperity, values, or security of the United States, world peace, or other significant societal, public or private endeavours”.
Mr Biden had been scheduled to present the medal to Pope Francis, 88, in person on Saturday in Rome on what was to be the final overseas trip of his presidency. But the president cancelled his visit to monitor the California wildfires.
The White House said Mr Biden bestowed the award during a phone call in which they also discussed efforts to promote peace and alleviate suffering around the world.
The award can be presented with or without distinction.
Mr Biden presented the medal of freedom – without distinction – on 5 January to several people including fellow Democrat Hillary Clinton, humanitarian and U2 singer Bono, fashion designer Ralph Lauren and actors Michael J Fox and Denzel Washington.
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Mr Biden himself is a recipient of the award with distinction, recognised when he was vice president by then president Barack Obama in a surprise ceremony eight years ago.
The citation for the pope’s honour said his “mission of serving the poor has never ceased”.
“A loving pastor, he joyfully answers children’s questions about God. A challenging teacher, he commands us to fight for peace and protect the planet. A welcoming leader, he reaches out to different faiths,” it added.
Ukraine has captured two North Korean soldiers fighting in Russia’s Kursk region, President Volodymyr Zelenskyy has said.
The injured pair are now in Kyiv and communicating with the Security Service of Ukraine, the country’s domestic intelligence agency, he said.
Ukrainian special forces and paratroopers captured the North Koreans, Mr Zelenskyy said in a post on X.
“As with all prisoners of war, these two North Korean soldiers are receiving the necessary medical assistance,” he said.
“I have instructed the Security Service of Ukraine to grant journalists access to these prisoners.
“The world needs to know the truth about what is happening.”
Mr Zelenskyy said capturing the soldiers alive was “not easy”. He also claimed Russian and North Korean forces fighting in Kursk have tried to conceal the presence of North Korean soldiers, including by killing wounded comrades on the battlefield to avoid their capture and interrogation by Ukraine.
The post included images of the two men – one with a bandage around his jaw and the other around both hands and wrists – and what appeared to be a Russian military document.
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Ukrainian drone targets Kursk soldiers
Ukraine’s security service SBU on Saturday provided further details.
It said one of those detained had no documents at all, while the other had been carrying a Russian military ID card in the name of a man from Tuva, a Russian region bordering Mongolia.
“The prisoners do not speak Ukrainian, English or Russian, so communication with them takes place through Korean translators in cooperation with South Korean intelligence,” a statement said.
One of the soldiers claimed he had been told he was going to Russia for training, rather than to fight against Ukraine, according to the SBU.
The agency added both men are being provided with medical care in line with the Geneva Conventions, and investigated “in cooperation with South Korean intelligence”.
North Korean regular troops entered the war on Russia’s side in October, according to Ukraine and its Western allies.
US, South Korean and Ukrainian intelligence assessments suggest up to 12,000 North Korean combat troops have been sent by Pyongyang under a pact with Moscow.
They believe North Korea has also been supplying Russia with vast quantities of artillery shells.