The United States will continue in a decades long, post-9/11 state of emergency for at least another year. In a Thursday night declaration, President Joe Biden ensured the emergency will extend at least 23 years after coordinated attacks killed nearly 3,000 people in New York, Virginia and Pennsylvania. Biden penned his signature to a one-year extension of President George W. Bush's Proclamation 7463, retaining broad powers over the organization of the military. The proclamation is officially titled "The National Emergency with Respect to Certain Terrorist Attacks." Most emergencies are used to impose economic sanctions. But Proclamation 7463, along with the broad 2001 Authorization for Use of Military Force, gives the president the power to call up the National Guard, alter the size and shape of the military's top officers and hire or fire commissioned officers " even ordering them out of retirement if necessary. Biden has most recently cited the 2001 authorization to justify drone strikes against al-Shabab militants in Somalia in 2021. The National Emergencies Act, adopted in 1976, requires presidents to renew emergencies each year. Presidents Barack Obama and Donald Trump also extended the 9/11 state of emergency each year of their respective tenures. Trump used it in 2017 to fill a chronic shortage in Air Force pilots. So far, Biden has declared eight new emergencies, continued 34 from his predecessors and ended three.