In the aftermath of the attacks, tens of thousands of people attempted to flee Afghanistan due to the possibility of a military retaliation by the United States. Pakistan, already home to many Afghan refugees from previous conflicts, closed its border with Afghanistan on September 17, 2001.
In the aftermath of the September 11 attacks, the NYSE was closed for four trading sessions, resuming on Monday, September 17, one of the rare times the NYSE was closed for more than one session and only the third time since March 1933.
Shortly after the attacks, President Bush made a public appearance at Washington, D.C.'s largest Islamic Center and acknowledged the "incredibly valuable contribution" that millions of American Muslims made to their country and called for them "to be treated with respect.".