An isolated incident?

So was Major Hasan's action 'an isolated incident'? Not according to this article:

"Hasan's attack was the third incident this year in which US military installations were targeted by radicals. In September, two North Carolina men were charged for allegedly conspiring to kill US personnel at the Marine Corps Base Quantico, home of the Marines' officer training school and the FBI Academy. In June, Abdul Hakim Mujahid Muhammad, an American Muslim convert, allegedly fired at two soldiers taking a cigarette break outside a recruiting center in Little Rock, Ark., killing one and injuring the other. Authorities say the alleged shooter said the attack was retaliation for US military actions overseas."

(Thanks to Daily Alert.)