Last Thursday, Nov. 5, Maj. Nidal Malik Hasan, an Army psychiatrist and devout Muslim, fatally shot 13 U.S. American citizens (12 service men and women) and wounded an additional 30 people at the largest U.S. military installation, Fort Hood, Texas.

Semi Osman, a Seattle-based Muslim cleric, served in a naval reserve fueling unit based in Tacoma, Wash., and was arrested for involvement of a terrorist training camp in Bly, Ore.

Jeffrey Leon Battle, a former Army reservist, was indicted in October 2002 for conspiring to wage war against American soldiers in Afghanistan and “enlisting in the Reserves to receive military training to use against America.”

In 2003, Sgt. Asan Akbar, a Muslim American soldier, rolled hand grenades and shot his automatic rifle into three tents filled with sleeping commanding officers at the 101st Airborne Division’s 1st Brigade operations center in Kuwait.

In May 2007, five men suspected of being Islamic militants were arrested by the FBI and charged with plotting to attack Fort Dix, N.J. In April, four were sentenced to life imprisonment, and the fifth to 30 years.

U.S. soldier Hasan Abujihaad was convicted in 2008 of espionage and other terrorist acts after serving on the USS Benfold and sharing classified information with al-Qaida financiers.

And who can forget John Muhammad, a Muslim convert and a member of the Army’s 84th Engineering Company, who was suspected of throwing a grenade into a tent of 16 fellow sleeping soldiers just before the ground attack of the Gulf War in 1991? Eight years later after being discharged in 1994, he was arrested in the 21-day Beltway shooting spree that left 10 Americans dead and three wounded.