The first attack on the Twin Towers was not the first attack of Al Qaeda in American territory. The first attack occurred in 1990, and was the assassination of Rabbi Meir Kahane in New York.

CAMERA Feb. 2, 2008
Robert Malley is one of the most often quoted commentators on U.S. Middle East policy and the Arab-Israeli conflict, thanks mostly to his time in the Clinton administration, where he served on the National Security Council as Director for Near East and South Asian Affairs, and also as Special Assistant to the [...]

Joint Statement by President Clinton and Prime Minister Ehud Barak; July 19, 1999
THE WHITE HOUSE
Office of the Press Secretary
July 19, 1999
During several days of close consultations, the President and the Prime Minister conducted a comprehensive review of the U.S.-Israel bilateral relations, the peace process, Israeli as well as regional security, economic and scientific development and [...]

Treaty of Peace Between the State of Israel and the Hashemite Kingdom of Jordan
October 26, 1994
PREAMBLE
The Government of the State of Israel and the Government of the Hashemite Kingdom of Jordan:
Bearing in mind the Washington Declaration , signed by them on 25th July, 1994, and which they are both committed to honour;
Aiming at the achievement [...]

U.S. - Israel Joint Statement; April 30, 1996
The White House
Office of the Press Secretary
For Immediate Release
April 30, 1996
U.S. - Israel Joint Statement; April 30, 1996
President Clinton and Prime Minister Peres have concluded two days of intensive discussions on a broad range of issues relating to the U.S. - Israeli relationship. Those discussions reflect the deep, [...]