A bullish US President Donald Trump has proclaimed a "new American moment" as he delivered his maiden State of the Union speech to Congress.
In a primetime address, the Republican leader said he was "extending an open hand" to Democrats to work together.
Mr Trump also said he was ordering Guantanamo Bay to be kept open, reversing an Obama-era directive to close the controversial detention camp.
The American economy is booming but Mr Trump's approval rating languishes.
In an upbeat message a world away from his apocalyptic "American carnage" inaugural speech of just a year ago, Mr Trump said his administration was "building a safe, strong and proud America".
"There has never been a better time to start living the American dream," he told lawmakers in a one-hour-and-20-minute speech.
As many as 40 million television viewers were expected to tune in as he implored the nation to come together as "one team, one people and one American family".
Mr Trump made a plea for the kind of bipartisan co-operation that has been in short supply during a turbulent first year in office.
The president, who has enraged Democrats by withdrawing protections for immigrants who entered the US illegally as children, offered an olive branch.
"Tonight I am extending an open hand to work with members of both parties, Democrats and Republicans, to protect our citizens, of every background, colour and creed."
But he insisted on a border wall with Mexico and other concessions from Democrats as part of any over-arching immigration deal.
Some Democrats booed when the president said he wanted to curtail an allowance for legal immigrants to bring family members into the country.
Mr Trump again touted his pet plan to rebuild America's aging roads and other infrastructure, though he did not offer many details.
The president said that 2.4 million jobs had been created on his watch.
Since he came to office, the stock market has soared and the unemployment rate is at a 17-year low as the US continues its recovery from the recession of a decade ago.
But had an average job approval last year of 38%, the lowest first-year rating for any president in the history of Gallup polling.
Massachusetts congressman Joseph Kennedy III, a great-nephew of President John F Kennedy, delivered the Democratic rebuttal.
He attempted to seize Mr Trump's political mantle by purporting to speak for "Americans who feel forgotten and forsaken".
Bewailing a "fractured country" and depicting the Trump presidency as "chaos", Mr Kennedy, 37, said: "Many have spent the past year anxious, angry, afraid."
"Bullies may land a punch," he said. "They might leave a mark.
"But they have never, not once, in the history of our United States, managed to match the strength and spirit of a people united in defence of their future."
In one telling moment from Mr Trump's speech, members of the Democratic Congressional Black Caucus sat in stony-faced silence amid a standing ovation as the president noted African-American unemployment has hit a record low.
About a dozen Democratic lawmakers said they would boycott Mr Trump's speech.
One of them, California congresswoman Maxine Waters, told MSNBC: "Why would I take my time to go and sit and listen to a liar?"
Mr Trump condemned "depraved" North Korea.
He warned that Pyongyang's "reckless pursuit of nuclear missiles could very soon threaten our homeland.
"We are waging a campaign of maximum pressure to prevent that from happening."
Mr Trump paid tribute to a disabled defector from the regime, Ji Seong-ho, who fled the country on crutches and was in the audience.
The president also noted that nearly all the territory in Syria and Iraq once controlled by the Islamic State group has been retaken.
"We will continue our fight until [the Islamic State group] is defeated," Mr Trump vowed.
While his two White House predecessors have used their State of the Union speeches to forecast victory for American forces in Afghanistan, Mr Trump largely skirted what is now America's longest war.
In an apparent acknowledgment of the deteriorating security situation there, he said the US "military is no longer undermined by artificial timelines".
He only mentioned Russia once alongside China as a rival.
Mr Trump did not refer to the federal inquiry into whether his campaign colluded with Russia in the 2016 presidential election, a controversy that is dogging his presidency and which both he and Russia have denied. (BBC)