Over the past Century, terrorism has evolved from random killings to massive plans for terrorist groups. From the Trade Center bombing, to the September 11th attack in 2002, the United States had endured more than enough of its share of terrorism, and to this day continues to suffer.
The first real wake-up call occurred on February 26, 1993. The main conspirator, Ramzi Yousef, was first discovered with partner Abu Barra under fake passports (under the alias of Mohammed Jamal Khalifa) Both were arrested, but due to the fact that INS holding cells were overcrowded, Yusef was told to come back in one month, Whereas, Abu Barra was taken into custody on the spot for having luggage containing bomb-making instructions. Yusef's plan involved creating a car bomb made of urea pellets, nitroglycerin, sulfuric acid, aluminum/magnesium azide, and bottled hydrogen, and intended on preventing the smoke from escaping the towers, therefore, caching the public eye by poisoning people inside.
After the actual bombing, he then foresaw Tower One collapsing into Tower Two. The total cost of his project totaled to be $300 U.S. dollars leaving 6 people dead, and at least 1,040 injured. Due to the strength of the tower, and the lack of funding for a more powerful bomb, the World Trade Center did not collapse, but only left the world wondering what the country would do to protect itself from its new threat.
In April 1995 a truck bomb exploded on the outskirts of the Alfred P. Murrah Federal Building in Oklahoma City, Oklahoma, killing 168 people and injuring 800, making it the deadliest terrorist attack in United States history. The attack was caused as a direct result of a truck bomb planted by Timothy McVeigh. His initial plans were to "wake up America" to the danger of the government,