On Wednesday, the nuclear bag was handed over to the new US President, Joe Biden, due to the refusal of his predecessor, Donald Trump, to participate in the swearing-in ceremony, as it was customary to hand the bag over at the ceremony itself.

For the first time in US history, the transfer of the bag required unusual procedures, but it was carried out successfully and without any logistical problems.

The executive authority always has 3 nuclear bags, one that follows the president in all his travels, the second is placed in the vice president’s office in the event of something bad for the president, and the third is in reserve.

There is no button inside the bag for the president to press, but it enables him to interact with the military base that actually controls the nuclear weapon.

It is customary for the outgoing president to attend the inauguration ceremony of the new president on the stage of Congress, and during the ceremony, the bag is transported with its operating codes in a discreet manner.

American history professor Judge Gluck tells Al-Jazeera that the security services have worked to ensure the transfer of the nuclear bag and reach the president-elect, despite Trump not attending the presidential inauguration ceremony.

When Trump refused to attend the ceremony, he boarded a plane on Wednesday morning from Andrews Air Force Base near Washington, heading to his residence in Florida, and he was accompanied by the military aide who always accompanied him to carry the bag, and Trump was also carrying a small plastic card containing the nuclear codes.

At the same time, another military aide was carrying another briefcase and another card on Biden's inauguration, and at exactly noon the bag handover ceremony was replaced by the invalidation of the Trump card and the Biden card activation.

House of Representatives Speaker Nancy Pelosi had expressed her concern over the use of an "unbalanced" president who had the right to launch a nuclear strike a day after the "Trump" stormed Congress, but observers ruled out that Trump would launch a nuclear strike at the end of his rule.