According to tapes played at the trial of the "terrorists" in that case, the FBI planted Emad A. Salem to infiltrate an Arab group in New York. His job was to act, again, as an agent provocateur -- inciting violent attacks. It was Salem who convinced the other participants to bomb the World Trade Center. When he was asked to assemble the bomb, he went to the FBI to ask for harmless powder to avoid a catastrophe. The FBI essentially cut him off. To make a long, complicated story short and simple: The FBI spent $3 million of your tax money to blow up the World Trade Center....

http://www.worldnetdaily.com/news/article.asp?ARTICLE_ID=14869

FBI Informant Edam Salem: "...we was start already building the bomb which is went off in the World Trade Center. It was built by supervising supervision from the Bureau and the DA and we was all informed about it and we know that the bomb start to be built. By who? By your confidential informant. What a wonderful great case!"