As President Donald Trump wrapped up the ceremony of his inauguration and shifted to governing, he signalled he intends to move quickly to make a clean break from the Obama administration.
Trump spent his first night in the White House and was slated to start his first full day in office at a national prayer service Saturday morning.
The traditional gathering was the last piece of the transition ritual for the new president before he was clear to get to work.
Trump took his first steps in that direction on Friday. Before attending his inaugural balls, he signed an executive order aimed at undermining former President Barack Obama's signature health care law.
The order notes that Trump plans to seek the "prompt repeal" of the law. But in the meantime, it allows the Health and Human Services Department and other federal agencies to delay implementing any piece of the law that might impose a "fiscal burden" on states, health care providers, families or individuals.
Trump also cleared the way for members of his national security team to take their places.
He signed legislation granting James Mattis, his pick for defence secretary, a one-time exception from federal law barring former US service members who have been out of uniform for less than seven years from holding the top Pentagon job.
The restriction is meant to preserve civilian control of the military. Mattis, 66, retired from the Marine Corps in 2013.
Hours later, Mattis was confirmed by the Senate as Trump watched his inaugural parade from a stand outside the White House.
The Senate later confirmed retired Geneeral John Kelly to lead the Homeland Security Department. Vice President Mike Pence swore in both men late Friday.
In a separate step on Friday, White House chief of staff Reince Priebus issued a memo aimed at freezing some new regulations and halting ones that Obama's administration had started.
Trump brought his signature style to the task of governing, sprinkling his comments at three inaugural balls with references to "phony polls," campaign victories and social media.
"Let me ask you: should I keep the Twitter going?" he asked a cheering crowd of supporters before dancing with his wife, Melania, to Frank Sinatra's My Way at the second of three inaugural balls.
People take part in a sister rally held in solidarity with the upcoming Women's March in Washington, in Bangkok, Thailand. Source: AAP
"The enemies keep saying, 'Oh that's terrible,' but it's a way of bypassing dishonest media."'
On Saturday, Trump was due to attend a prayer service at the Washington National Cathedral, an Episcopal parish with a dual role as a civic gathering place.
The cathedral has for years hosted a prayer service for the new president. But keeping the tradition has sparked debate this year among Episcopalians opposed to Trump's policies.
While some in the largely liberal congregation objected to hosting the service, Bishop Mariann Budde of the Episcopal Diocese of Washington wrote in a blog post that she shared "a sense of outrage at some of the president-elect's words and actions" but also she felt an obligation to welcome all people without qualification, especially those who disagree and need to find a way to work together.
Trump was also expected to visit the CIA on Saturday, meeting with members of the nation's intelligence community.
The visit may be fraught with tension. Trump has sharply criticised the nation's top intelligence officials for their assertions about Russian hacking and leaks about his briefings in the weeks before he was sworn in.
