Cameron said Khan had been plotting to attack public commemorations.
He was arrested in 2002 and charged with plotting to attack several embassies in Sana.
Yet we now know that thousands of trained killers are plotting to attack us.
The suspect was arrested on United States soil and arrested for plotting to attack a civilian target.
The man, David C. Headley, also pleaded guilty to charges of plotting to attack a Danish newspaper that published cartoons of the Prophet Muhammad in 2005.
Today, the rumour is that Islamic State (IS) terrorists are lurking in Ciudad Juárez, just across the Rio Grande from El Paso, and plotting to attack America.
In the early years, most strikes were aimed at ranking leaders of Al Qaeda thought to be plotting to attack the United States.
The men were accused of plotting to attack a train operated by Via Rail Canada, the government-owned rail system, within Canada.
The protesters, Brian Church, Jared Chase and Brent Vincent Betterly, were arrested before the meeting in Chicago and accused of plotting to attack President Obama's campaign headquarters.
The U.S. agencies warned that Lashkar was plotting to attack Mumbai, that Westerners and foreigners would be targeted and that the Taj hotel was a target.
"Yet we now know that thousands of trained killers are plotting to attack us, and this terrible knowledge requires us to act differently".
