Functioning as a mobile hub in the strategic defense system of the United States, the football is carried by a military aide when the president is traveling.
"[3] General Chester Clifton stated in his 1986 interview that the term was used "jokingly", and he described how warrant officers, who were on a twenty-four hour schedule, would regularly hand-off the briefcase to the next person.
The newspaper article citing the denial, the syndicated "Allen-Scott Report," is perhaps the earliest public reference to the "football," quoting Valenti as saying that "The 'black bag' or 'football', as we call it, goes wherever the President travels.
[citation needed] Before the order can be followed by the military, the president must be positively identified using a special code issued on a plastic card, nicknamed the "biscuit".
[19] The authentication is conducted between the president and the National Military Command Center deputy director of operations, using a challenge code of two phonetic letters.
[30] Some military officials, including General John Hyten, have testified to the U.S. Congress that they would refuse to carry out an unlawful order for a nuclear strike.
"[33] Nevertheless, the president, once in office, as noted by former Defense Secretary William Perry and Tom Z. Collina, retains the sole authority to launch a nuclear strike or attack.
[34] The football is carried by one of the rotating presidential military aides (one from each of the six armed forces service branches), whose work schedule is described by a top-secret rota.
The notion that a designated military aide should accompany a traveling president with a special satchel for such purposes was the creation of White House naval aide Edward L. Beach Jr.[42] On 19 January 1961, the day before his inauguration, president-elect John F. Kennedy received a briefing from President Eisenhower and his staff secretary General Andrew Goodpaster on emergency procedures in a nuclear crisis.
[48] Another administrative response may have been the inclusion in the "Black Bag" of a card, later known as the "Biscuit," with the codes needed to authorize launches of nuclear weapons.
According to William Manchester's account, by the time of Kennedy's assassination, the "Black Bag" included such codes, as well as contact details for communicating with the British Prime Minister and the President of France in a nuclear crisis.
[49][50] A major component of the "Black Bag" was the "SIOP Execution Handbook," also known as the "Gold Book," with details on the Single Integrated Operational Plan attack options available to decision-makers.
A 1965 Baltimore Sun article reported on how the launch codes could be transmitted in a crisis and on the systems that were in place at the Pentagon to verify presidential orders.
When President Richard Nixon attended the ceremonial opening of the Bay Area Rapid Transit in September 1972, his hosts were aware of a "peculiar briefcase" carried by a U.S. Marine officer.
[60] The "biscuit" was separated from a severely wounded Ronald Reagan immediately after the 1981 assassination attempt when the George Washington University hospital emergency department trauma team cut into his clothing.
[64] The photo was posted while Trump was hosting Japanese Prime Minister Shinzo Abe, around the same time as news broke that North Korea had fired a nuclear-capable Pukguksong-2 ballistic missile over the Sea of Japan.
[63] On November 8, 2017, when President Trump made a state visit to China, U.S. military aides carrying the football were reportedly involved in a "short scuffle" with Chinese security officials, after the latter tried to bar the former access to the Great Hall of the People auditorium.
[67] Political correspondent Jonathan Swan, who reported the incident, wrote, "I'm told that at no point did the Chinese have the nuclear football in their possession or even touch the briefcase.
"[67] On January 6, 2021, during the storming of the United States Capitol by rioters, security footage, displayed during the subsequent Trump impeachment trial, showed Vice President Mike Pence along with the aide carrying the backup football being hastily evacuated from the Senate chamber.
At the noon EST transition time, the codes in the footballs accompanying Trump and Pence (who did attend the inauguration) were deactivated, and those in Biden's and incoming Vice President Kamala Harris's were activated.
[69][70] In February 2021, a group of 31 Congress members signed a letter requesting that President Biden give up sole authority to use the nuclear launch codes.
The service chiefs were assigned to an advisory role to the president and the secretary of defense and given the responsibility for training and equipping personnel in the unified combatant commands.