The Defense Department initially claimed the strike was conducted on an Islamic State suicide bomber threatening Kabul Airport, but admitted the suspect was harmless on September 17, calling its killing of civilians "a tragic mistake".[376]
The U.S. military completed withdrawal from Afghanistan on August 30. Biden called the extraction of over 120,000 Americans, Afghans and other allies "an extraordinary success".[377] He acknowledged that up to 200 Americans who wanted to leave did not, despite his August 18 pledge to keep troops in Afghanistan until all Americans who wanted to leave had left.[378]

Infrastructure and climate
Further information: Build Back Better Plan and Environmental policy of the Joe Biden administration
Biden, UK prime minister Boris Johnson and UN secretary-general António Guterres at the opening ceremony of the COP26 climate summit in Glasgow on November 1, 2021
As part of Biden's Build Back Better agenda, in late March 2021, he proposed the American Jobs Plan, a $2 trillion package addressing issues including transport infrastructure, utilities infrastructure, broadband infrastructure, housing, schools, manufacturing, research and workforce development.