The FBI is vetting all 25,000 National Guard troops in Washington, D.C., for the inauguration of President-elect Joe Biden amid fear of an insider attack.
The vetting process follows a riot on January 6 that saw supporters of President Trump storming the Capitol building.
"We're continually going through the process, and taking second, third looks at every one of the individuals assigned to this operation," Army Secretary Ryan McCarthy said.
The FBI vetting process includes running peoples' names through bureau databases and watchlists to check if there are any causes for concern, such as being involved in prior investigations or being connected to terrorism, according to David Gomez, a former FBI national security adviser.
The vetting process is set to be completed by Wednesday.
"This is a national priority. We have to be successful as an institution," said McCarthy. "We want to send the message to everyone in the United States and for the rest of the world that we can do this safely and peacefully."
🔦 The 25,000-strong force in Washington, D.C., is at least two and a half times the number for previous inaugurals.