White House says some employees were fired by mistake

Alexander Vinnik is now back in Moscow as part of an exchange for American teacher Marc Fogel.

Fogel arrived back in the U.S. on Tuesday after being held in Russia for three-and-a-half years on drug charges.

Vinnik was the owner and operator of one of the world's largest currency exchanges, and was allegedly instrumental in facilitating the transfer of billions of dollars for criminals across the globe, supporting drug trafficking rings, ransomware attacks and the corruption of public officials.

-ABC News' William Gretsky

As DOGE continues to work its way through Washington, D.C., a young member of the team is at the IRS headquarters today, according to multiple sources familiar with the visit.

The aide arrived at the headquarters today and has initiated multiple meetings with IRS employees, the sources said. In part, they have been asking about the agency’s technology, including how audits and compliance are done.

Elon Musk has previously taken to X regarding the IRS, asking in a post earlier this month: "Would you like @DOGE to audit the IRS?"

The IRS is within the Department of Treasury, where DOGE staffers have been on site for weeks, as ABC News has previously reported. The visit also comes amid tax season.

The IRS did not immediately respond to ABC's request for comment.

-ABC News' Olivia Rubin, Will Steakin and Katherine Faulders

Addressing reporters in the Oval Office, President Donald Trump did not say in what capacity Elon Musk met with Indian Prime Minister Narendra Modi on Thursday.

Trump said he didn't know whether Musk met the prime minister as a businessman or as a representative of the U.S. government.

"Well, he's meeting with me in a little while, so I'm going to ask him that question," Trump said.

Hours after being narrowly confirmed by the Senate along party lines, Robert F. Kennedy Jr. was sworn in to serve as Trump's health and human services secretary.

Joining the ceremony at the White House was Trump, who called Kennedy a "friend" who will lead "historic reforms" in American health care.

"Immediately after Bobby is sworn in, I will be signing an executive order establishing the President's Commission to Make America Healthy Again," Trump said. "This groundbreaking commission will be charged with investigating what is causing the decades-long increase in chronic illness, reporting its findings and delivering an action plan to the American people."