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If you're just joining us, here's what you need to know: 

Midnight Oil fans bask in the band's final concert

Aussie rockers Midnight Oil closed out their reunion tour at Sydney's Hordern Pavilion last night, and fans have been reminiscing all morning.

Prime Minister Anthony Albanese was at the gig — as was ABC News Breakfast host Michael Rowland, who wrote on Instagram:

"Thank you dearly to the band for providing the soundtrack of my life.

"And thank you for helping instil a social conscience in the spotty Sydney teenager who sweated through your gigs in the early 80’s! This is something I will remember."

According to a set list posted online, Midnight Oil played around 40 songs from throughout their career.

You can see some images from the show (and the set list) below.

US to impose 'further costs' on Iranian officials over violence against protesters

US President Joe Biden says his country will this week impose "further costs" on Iranian officials responsible for violence against demonstrators who protested against Iran's government after the death of Mahsa Amini.

Amini, a 22-year-old from Iranian Kurdistan, was arrested by morality police in Tehran on September 13 for "unsuitable attire".

She died three days later in hospital after falling into a coma.

Iran's supreme leader has blamed the US and Israel for the protests which have followed Amini's death.

The unrest has lead to widespread demonstrations, leaving at least 130 people dead so far.

Ayatollah Ali Khamenei has ordered security forces to continue cracking down on the civil disobedience.

Wall Street sees strongest rally in months

Stocks on Wall Street have rallied to their best day in months after falling bond yields eased some of the pressure that’s been battering US markets.

The S&P 500's leap of 2.6 per cent is its biggest since July.

The Dow Jones Industrial Average is also up 2.6 per cent, and the tech-heavy Nasdaq is 2.2 per cent higher.

The local sharemarket is also expected to open higher when it opens this morning:

'All of America's with you': Biden visits storm-hit Puerto Rico following Hurricane Fiona

US President Joe Biden has pledged more than $US60 million ($92 million) in aid to help Puerto Rico, and has said more money is coming, while surveying damage from Hurricane Fiona.

Biden also alluded to the controversy surrounding Donald Trump's response to Hurricane Maria when it ravaged Puerto Rico in 2017, killing thousands.

Trump objected to sending more money to Puerto Rico after the hurricane and froze billions intended for the island, a move Biden has reversed.

"Yes, Puerto Rico is a strong place and Puerto Ricans are a strong people, but even so you have had to bear so much, more than need be, and you haven't gotten help in a timely way," Biden said.

Ukraine's president hits back at Elon Musk on Twitter

Ukrainian President Volodymyr Zelenskyy has hit back at Tesla CEO Elon Musk, after the world's richest man asked Twitter users to weigh in on a plan to end Russia's war in Ukraine.

Musk proposed UN-supervised elections in four occupied regions which Moscow moved to annex last week after what it claimed were referendums.

The votes were denounced by Kyiv and Western governments as illegal and coercive.

Musk polled his followers with his potential solutions:

Zelenskyy then responded with his own poll.

"Which @elonmusk do you like more?," he tweeted, offering two responses: one who supports Ukraine, one who supports Russia.

Lithuania's president also responded by saying that when someone tries to steal the wheels of a Tesla, it doesn't make them the legal owner of the car, or of the wheels.

BREAKING: Donald Trump sues CNN, claiming defamation

Former US president Donald Trump is suing American cable news channel CNN, claiming it defamed him.

He is seeking $US475 million ($729 million) in punitive damages, according to a federal court filing in Florida.

Mr Trump claims the network carried out a "campaign of libel and slander" against him, and used its influence to defeat him politically.

Mr Trump claims in the lawsuit that CNN used defamatory labels against him such as "racist", "Russian lackey", "insurrectionist" and "Hitler".

CNN has so far declined to comment on the case.

The lawsuit comes as the former president faces a criminal investigation by the US Justice Department for retaining government records at his Mar-a-Lago estate in Florida after leaving office in January 2021.

King Charles has marked his first official public engagement since the Queen's mourning period ended

King Charles III has given a short speech in Scotland, marking his first official public engagement since the royal mourning period ended.

The royal family have observed nearly a full month of mourning since Charles's mother, Queen Elizabeth II, died.

Charles and the Queen consort, Camilla, took part in a ceremony formally giving city status to the Scottish municipality, Dunfermline.

Dunfermline was among eight towns that won city status as part of Platinum Jubilee celebrations earlier this year to mark the Queen's 70 years on the throne.

"There could be no more fitting way to mark my beloved mother's extraordinary life of service than by granting this honor to a place made famous by its own long and distinguished history, and by the indispensable role it has played in the life of our country," the King said in a speech.

"We gather to celebrate this great occasion but also to commemorate the life of Her late Majesty, whose deep love for Scotland was one of the foundations of her life," he added.

Twitter is finally rolling out its edit button

After some testing, Twitter's long-awaited (and somewhat controversial) edit button is now rolling out to paying subscribers of Twitter Blue in Australia, Canada and New Zealand.

It's unclear when it will be available to regular non-paying users of the social media network.

Ringo Starr postpones tour as he recovers from COVID

Ringo Starr has been forced to postpone five concerts in Canada after he tested positive to COVID-19.

The 82-year-old former Beatle was meant to perform with his All Starr Band — which included the frontmen of bands like Toto and Men at Work — over the next week.

In a statement, Starr says he's currently recovering from the virus at home, and hopes to resume touring as soon as possible.