The events of 9/11 rocked the United States and caused reverberations in domestic and foreign policy for decades.

Nation Sep 11

U.S. President Biden attends Pentagon commemoration of September 11 attacks
WATCH: Biden honors 9/11 victims at Pentagon on anniversary of attacks

President Joe Biden marked the 21st anniversary of the Sept. 11 attacks, taking part in a somber wreath-laying ceremony at the Pentagon held under a steady rain and paying tribute to “extraordinary Americans” who gave their lives on one of the nation's…