During a meeting with Osama bin Laden and other al-Qaeda leaders in 1988, Mamdouh Mahmud Salim discussed the formation of al-Qaida. Numerous crimes have been attributed to the Sudanese terrorist; nevertheless, in 1998 he was apprehended in Germany for his alleged involvement in the bombings of the US embassies in Kenya and Tanzania that year. He was originally sentenced to 32 years, but in 2010, after a botched attempt to escape in which he stabbed a prison officer, he was resentenced to life in prison without the possibility of release.
2. Michael Swango.
He was indeed a doctor who used his medical license to poison patients for the majority of the 1980s and 1990s. 3. He was able to acquire an internship at the Ohio State University Medical Center in 1983 despite having horrified many people by the time he graduated from the Southern Illinois University School of Medicine (including being caught "faking" checkups during OB-GYN rotations). The beginning of his career as a serial killer is said to have taken place here. It is thought that Swango poisoned more than 60 individuals with arsenic, yet he was only prosecuted for four homicides. It was in 2000 that Swango was convicted of a life sentence.
3. Ramzi Ahmed Yousef.
Inside the car park of the North Tower of the World World Trade centre in downtown New York City, a 1,300-pound nitrate-hydrogen gas bomb exploded, killing six people and wounding hundreds. A year after the attack, Yousef fled to Pakistan and wasn't found until 1995, when he was found guilty and given the maximum penalty of death by hanging. He claimed he was "proud" of his terrorist status and was sentenced to death. Only six of the seven suspected perpetrators of the WTC attack were apprehended. The FBI was offering a reward of up to $5 million for information leading directly to the arrest of Abdul Rahman Yasin, who is still at large.
4. Robert P. Hanssen is the fourth name on the list.
For 25 years, Robert P. Hanssen worked for the FBI, from 1976 to 2001. After selling hundreds of sensitive pieces of information to the Soviet and Russian security services, he amassed a fortune of at least $1.4 million when he was finally captured in 2001. After pleading guilty to fourteen counts of spying and a single espionage conspiracy count, Hansen received a 15-year sentence. According to William H. Webster, the head of the Committee for the Assessment of FBI Security Programs, it was "perhaps the biggest intelligence failure in U.S. history."
5. Richard C. Reid.
Due to the lack of bombs going off, Reid took an American Airlines aircraft from Paris to Miami in late 2001. It was a lucky escape for him. After a forced landing at Logan International Airport in Boston, he was attacked by passengers and arrested. He was convicted of eight terrorism-related charges and sentenced to three life terms with an additional 110 years without parole.
