Donald Trump has signed sweeping executive orders on his return to the US presidency, vowing swift action on some of his top campaign issues.
Among the directives that have gained the most publicity are an immigration crackdown and rollbacks of some climate-friendly policies.
But even presidential powers have their limits – and in some cases, he faces hurdles before his plans can become reality.
Here are six of Trump’s eye-catching actions with analysis by BBC reporters, who give their verdict on whether each order could take effect.
What are executive orders?
Live updates on Trump’s second term

One of the people who served jail time for taking part in the US Capitol riot four years ago has refused a pardon from President Donald Trump, saying: “We were wrong that day.”
Pamela Hemphill, who pleaded guilty and was sentenced to 60 days in prison, told the BBC that there should be no pardons for the riot on 6 January 2021.
“Accepting a pardon would only insult the Capitol police officers, rule of law and, of course, our nation,” she said.
“I pleaded guilty because I was guilty, and accepting a pardon also would serve to contribute to their gaslighting and false narrative.”
Hemphill, who was nicknamed the “Maga granny” by social media users – in reference to Trump’s “make America great again” slogan – said she saw the Trump government as trying to “rewrite history and I don’t want to be part of that”.
“We were wrong that day, we broke the law – there should be no pardons,” she told the BBC World Service’s Newsday programme.
Proud Boys and Oath Keepers among those pardoned over riot
What are presidential pardons and how do they work?
Trump’s decision to pardon or commute the sentences of nearly 1,600 people involved in the attempt to violently overturn the 2020 election came just hours into his presidency.
In a news conference on Tuesday at the White House, he said: “These people have already served years in prison, and they’ve served them viciously.
“It’s a disgusting prison. It’s been horrible. It’s inhumane. It’s been a terrible, terrible thing.”
However, the move has drawn an uneasy reaction from some Republican politicians.
Senator Thom Tillis, from North Carolina, said he “just can’t agree” with the move, adding that it “raises legitimate safety issues on Capitol Hill”.
Another Republican US senator, James Lankford from Oklahoma, told CNN: “I think we need to continue to say we are a party of law and order.”
He added: “I think if you attack a police officer, that’s a very serious issue and they should pay a price for that.”

South Korea’s suspended president Yoon Suk Yeol has made his first appearance at his impeachment trial, where he denied ordering the arrest of lawmakers during his attempt to impose martial law.
Parliament voted to impeach Yoon last month, and last week the Constitutional Court began a trial to decide whether to permanently remove him from office.
Yoon is also facing a separate criminal investigation into whether he led an insurrection. He has been detained since last week.
Security was tight on Tuesday as Yoon was transported by van from the detention centre, where he is being held, to the Constitutional Court.