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The attacks in New York City, Washington D.C., and Shanksville, Pennsylvania, United States, killed 2,993 people
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Anthrax attacks kill 5 and infect 17 others by anthrax spores in New York City, New York, Boca Raton, Florida, and Washington D.C. in the United States
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The war in Afghanistan begins
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Operation Active Endeavour officially begins
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Philippines begins as part of Operation Enduring Freedom in the Southern Philippines.
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The Georgia Train and Equip Program begins
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Operation Enduring Freedom - Horn of Africa begins
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Anti-war groups across the world organized public protests against war with Iraq. About 36 million people across the globe took part in almost 3,000 protests
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Colin Powell addressed a plenary session of the United Nations Security Council, stating categorically that Saddam Hussein was working to obtain key components to produce nuclear weapons
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The Iraq War begins. President George W. Bush refers to it as "the central front in the War on Terror"
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Saddam Hussein is found and captured by U.S. forces
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The Georgia Train and Equip Program ends, but military assistance to Georgia continued through the Georgia Sustainment and Stability Operations Program.
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The United States government, led by the Central Intelligence Agency's Special Activities Division, begins a series of ongoing attacks on targets in northwest Pakistan using drones (unmanned aerial vehicles). These attacks sought to defeat the Taliban and Al-Qaeda militants who were thought to have found a safe haven in Pakistan
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The 1st London bombings kill 52 people and injure 700 more
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The Operation Enduring Freedom – Trans Sahara begins
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Newly elected Obama administration has stopped using the phrase "war on terror". John Brennan announces that the U.S. is "at war with al Qaeda", not involved in a "global war on terror"
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Osama bin Laden is killed in a raid by United States Naval Special Warfare Development Group on his residence in Pakistan
