Biden and First Lady Jill Biden left the White House just a few moments ago for the short drive up Pennsylvania Avenue to the U.S. Capitol, where the president will deliver his first State of the Union address tonight.

Biden did not respond to a shouted question asking if Russian President Vladimir Putin has committed war crimes in Ukraine.

-ABC News' Justin Ryan Gomez

Biden tonight will touch on his plan to address crime and make the case for more community-based policing, rather than defunding the police, a White House official told ABC News.

"He'll make clear that the answer is not to defund the police, it’s to put more police -- with better training and more accountability -- out to take back our streets and make our neighborhoods safer," the White House official said. "And he’ll talk about the steps his administration has taken -- and will continue to take -- to advance that accountability and rebuild trust between law enforcement and the communities they serve."

Biden will also call on Congress to address gun violence, and pass "common-sense" gun violence legislation that will save lives, according to the official.

-ABC News' Molly Nagle

The nation's capital has ramped up security ahead of Biden's first State of the Union address tonight.

Up to 700 National Guard troops have been made available to assist local law enforcement, and a controversial inner-perimeter fence once again surrounds the U.S. Capitol.

The U.S. Capitol Police have also been working in tandem with local, state and federal law enforcement agencies on a "security plan to prevent any disruption to the important work of Congress," Capitol Police Chief Tom Manger said in a statement earlier this week.

-ABC News' Noah Minnie

For more live coverage of the State of the Union, head to FiveThirtyEight, which is providing updates on Biden's address as well as the Texas primary election.

"Given the current state of affairs, both foreign and domestic, tonight is a big night for the president," writes FiveThirtyEight politics reporter Alex Samuels.

In an ill-timed moment, Rep. Lauren Boebert, R-Colo., shouted at the president, blaming him for the deaths of the 13 U.S. servicemembers killed in an attack at the Kabul airport in Afghanistan last summer, as Biden spoke about veterans exposed to burn pits developing "cancer that would put them in a flag-draped coffin."

"You put them in, 13 of them!" she yelled.

But her words came out just as the president was about to mention the death of his son, Beau Biden, an Iraq War veteran who died from brain cancer in 2015.

"I know," Biden began, attempting to reference Beau. But before he could get the sentence out Boebert shouted.

The members in the chamber immediately booed her.

"One of those soldiers was my son, Major Beau Biden," the president continued. "I don’t know for sure if the burn pit that he lived near, that his hooch was near in Iraq and earlier than that, in Kosovo is the cause of his brain cancer, the diseases of so many other troops. But I am committed to finding out everything we can."

Boebert later addressed the moment on Twitter, saying, “When Biden said flag draped coffins I couldn't stay silent. I told him directly he did it. He put 13 in there. Our heroic servicemen and women deserve so much better.”

-ABC News' Mariam Khan