It's the latest development in the U.S. military's struggle to bring to justice the man charged with planning the Sept. 11 attacks on the United States.

The Biden administration has doubled down on its unusual court battle to derail a plea deal that the government itself had reached with accused 9/11 mastermind Khalid Sheikh Mohammed.

Lawyers for the accused 9/11 mastermind Khalid Sheikh Mohammed are urging a federal appeals panel to let his scheduled guilty plea in the attacks go forward

At a hearing beginning on Friday morning, Mohammed was scheduled to plead guilty to his role in the 11 September 2001 attacks, when hijackers seized passenger planes and crashed them into the World Trade Center in New York and the Pentagon outside of Washington. Another plane crashed into a field in Pennsylvania after passengers fought back.

The Biden administration succeeded in blocking a plea deal for Khalid Sheikh Mohammed after a federal court issued an administrative stay of a hearing set for Friday. The alleged 9/11 mastermind was expected to plead guilty as part of a plea agreement worked out by military prosecutors that would have removed the death penalty as a possibility in his case.

The Biden administration successfully delayed a plea deal for Khalid Sheikh Mohammed, accused 9/11 mastermind, that would avoid the death penalty. A federal appeals panel temporarily blocked the plea,

The justice department argued it would cause irreparable harm if Khalid Sheikh Mohammed and two co-defendants' pleas were accepted.

The Justice Department, on behalf of the Pentagon, on Tuesday asked an appeals court to block an effort to enforce plea deals reached with four accused conspirators of the Sept. 11, 2001, terrorist attacks.

The Department of Defense filed an emergency request with a federal appeals court Tuesday in an effort to stop plea deals given to three accused terrorists involved in the Sept. 11, 2001, terrorist attacks.

An appeals court on Thursday temporarily blocked a plea deal for three accused 9/11 plotters in a win for the Justice Department and Pentagon, which had requested this week that the court block the agreements ahead of a Friday hearing.