The federal prison complex in Terre Haute, Ind., is pictured in August 2020. All federal prisons in the United States have been placed on lockdown. Law enforcement agencies are taking measures in the aftermath of Jan. 6 insurrection and over concerns of more violence.

FILE – In this Aug. 26, 2020, file photo, the federal prison complex in Terre Haute, Ind. All federal prisons in the United States have been placed on lockdown, with officials aiming to quell any potential violence that could arise behind bars as law enforcement prepares for potentially violent protests across the country in the run-up to President-elect Joe Biden’s inauguration on Wednesday. (AP Photo/Michael Conroy, File)