Final answer:
After the 9/11 attacks orchestrated by Osama bin Laden, the U.S. launched a war on terror, including the invasion of Afghanistan. On May 1, 2011, Osama bin Laden was killed by U.S. forces in Pakistan. President Obama announced the withdrawal of U.S. troops from Afghanistan by September 11, 2021.
Step-by-step explanation:
On May 1, 2011, US forces killed al-Qaeda leader Osama bin Laden in Pakistan after a ten-year search following the leader's orchestration of the 9/11 attacks. In 2011, President Obama announced plans to fully withdraw U.S. troops from Afghanistan by September 11, 2021, the twentieth anniversary of the 9/11 attacks. This decision marked a significant moment in U.S. foreign policy and the ongoing 'War on Terror' which had started with Operation Enduring Freedom in 2001 aimed at dismantling al-Qaeda training camps and overthrowing the Taliban regime in Afghanistan.
The relationship between the United States and Afghanistan became a central focus of U.S. foreign policy, particularly after the nation supported the new Afghan government, post-Taliban. Despite these efforts, the war became increasingly complex due to geopolitical changes and additional military campaigns, including the invasion of Iraq in 2003.
The September 11 attacks had a profound impact on the nation, leading to a united front against terrorism and the support for military action to thwart further terrorist activities. The events also led to challenging international relations and policy decisions which would shape the course of the early twenty-first century.