ما هو الحدث الرئيسي الذي وقع في 11 سبتمبر، 2001، في الواليات المتحدة؟

الشرح

On September 11, 2001 hijacked airliners were flown into the World Trade Center and the Pentagon, with a fourth crashing in Pennsylvania. The other events listed happened in 1929, 1941 and around 1991.