Based on the findings of the 9/11 commission into the events leading up to the attack on the World Trade Center.
In Part 1, Serial bomber Ramzi Yousef of Palestinian/Pakistani decent fails to bring down the Twin Towers in 1993 with a car bomb that killed 6 and injured one thousand. He and his helpers had connections with Egyptian radical Omar Abdel-Rahman also known as the Blind Sheik who inspired the assassination of Egyptian President Anwar Sadat 10 years earlier for his peace talks with Israel. The Blind Sheik also knew Osama Bin Laden during the Afghan/Soviet War and had connections to the American CIA at that time as well. Even though the Blind Sheik was considered a terrorist the CIA helped secure his asylum in the US in 1990 where he ran a mosque in Brooklyn, NY. There he would preach Jihad against the US for their support of Israel. He was later arrested and convicted for his part in the planning of the 1993 World Trade Center bombing. The Blind Sheik assisted getting Ramzi Yousef into the US in 1992 by having one of his followers with Yousef be noticed by police at the airport while Yousef got away. Ramzi Yousef is also the nephew of Khalid Sheikh Mohammed who masterminded the 911 attacks and the two were planning numerous attacks before Yousef's arrest in 1995.
1993 World Trade Center bombing
The World Trade Center bombing was a terrorist attack that occurred on 26 February 1993, when a car bomb was detonated below Tower One of the World Trade Center in New York City, New York. The 1,500 lb (680 kg) urea nitrate-hydrogen gas enhanced device was intended to knock the North Tower (Tower 1) into the South Tower (Tower 2), to bring both towers down and kill thousands of people. It failed to do so, but killed six civilians and injured 1,042, including 919 civilians (including an EMS worker), 88 firefighters, and 35 police officers.
Ramzi Yousef sent a letter to The New York Times after the bombing that expressed his motive:
We are, the fifth battalion in the Liberation Army, declare our responsibility for the explosion on the mentioned building. This action was done in response for the American political, economical, and military support to Israel, the state of terrorism, and to the rest of the dictator countries in the region.
Our Demands Are:
1 - Stop all military, economical, and political aid to Israel.
2 - All diplomatic relations with Israel must stop.
3 - Not to interfere with any of the Middle East countries interior affairs.
If our demands are not met, all of our functional groups in the army will continue to execute our missions against the military and civilian targets in and out the United States. For your own information, our army has more than hundred and fifty suicidal soldiers ready to go ahead. The terrorism that Israel practices (which is supported by America) must be faced with a similar one. The dictatorship and terrorism (also supported by America) that some countries are practicing against their own people must also be faced with terrorism.
The American people must know, that their civilians who got killed are not better than those who are getting killed by the American weapons and support.
The American people are responsible for the actions of their government and they must question all of the crimes that their government is committing against other people. Or they - Americans - will be the targets of our operations that could diminish them.