oklahoma city was actualy the third worst terrorist attack in the us. on 10/31/99 the backup copilot (an egyptian national) on egyptair 990 from LA to New York to Cairo took control of the plane over the atlantic somewhere off the coast of MA. he waited until he was alone at the controls and began causing problems. he turnd off the auto piolt and the engines. he then put the plane into a steep dive. another crew member came in and the two fought for the controls. the plane puled up sharply then broke up. all 217 people on board were killed. 33 egyptian military officers and many american tourists were on borad. the presence of these 2 groups most likely explains the motive for the attack. cidizens of 7 countries died in the attack. for more information see http://www.ntsb.gov/Publictn/2002/aab0201.htm and http://en.wikipedia.org/wiki/EgyptAir_Flight_990#Passengers

this wasn't on U.S. Soil thus making your post invalid.

actualy the crash occured 60 miles off MA that puts it in us territorial waters.