Sept. 11, 2001: 8:45 a.m.:
American Airlines Flight 11 crashes into the north tower of the World Trade Center.
9:03 a.m.: United Airlines Flight 175 crashes into the south tower of the WTC.
9:40 a.m.: The FAA halts all flight operations at U.S. airports -- the first time in U.S. history.
9:43 a.m.: American Airlines Flight 77 crashes into the Pentagon.
10:10 a.m.: United Airlines Flight 93, crashes in Sommerset County, Pa.
Colin Powell names Osama bin Laden a suspect.
New York Mayor Rudy Giuliani announces that 4,763 people are missing in New York.
Pentagon announces that 188 people are missing or dead in Washington.
The FAA reopens most U.S. airports.
The U.S. Treasury Department announces it is setting up a new agency to probe terrorist funds.
Congress approves $40 billion in emergency funding.
The Senate unanimously approves military action against those responsible for the 9/11 attacks. The House approves the resolution, with Rep. Barbara Lee, D-Oakland, the lone dissenter.
Egyptian Adel Karas, 48, is shot to death in his import shop in San Gabriel, Calif.
Balbir Singh Sodhi, a 49-year-old Sikh, is shot to death outside his gas station in Mesa, Ariz. The man accused of killing him was quoted saying "all Arabs had to be shot."
In Dallas, Tex., Waqar Hasan, 46, is shot to death in his store, Mom's Grocery.
The Council on American-Islamic Relations says it has collected reports of more than 700 possible hate crimes across the U.S. since 9/11.
President Bush names bin Laden the "prime suspect."
Pentagon activates "Operation Noble Eagle."
Anthrax-tainted letters are sent to NBC anchorman Tom Brokaw and the New York Post.
Attorney General John Ashcroft announces the INS can detain immigrants suspected of terrorism for 48 hours before charging them.
U.S. Defense Department orders dozens of combat aircraft deployed to the Persian Gulf, the Indian Ocean and Afghanistan border countries. The Pentagon dubs the campaign "Operation Infinite Justice."
Sept. 20: Bush demands that the Taliban hand over Osama bin Laden.
Bush announces the creation of an Office of Homeland Security and names Pennsylvania Gov. Tom Ridge to the post.
Congress approves a $15 billion package to bail out the airline industry.
The Taliban rejects Bush's ultimatum that it hand over bin Laden.
Thousands flee Afghanistan in anticipation of U.S. military action.
The FAA for two days grounds all crop-dusting planes.
Donald Rumsfeld announces that the name "Operation Infinite Justice" is being replaced with "Operation Enduring Freedom" after Muslims complain that according to the Islamic faith, only God can dispense infinite justice.
Robert Stevens, 63, a photo editor at American Media, Inc. in Florida, dies from inhalation anthrax.
U.S. and Britain launch military strikes in Afghanistan.
Letters later testing positive for anthrax are sent to Senate Majority Leader Tom Daschle and Sen. Patrick Leahy.
Twelve Senate offices closed; hundreds of staffers are tested for anthrax exposure.
Anthrax discovered in House of Representatives office building.
A Washington, D.C. postal worker dies of inhalation anthrax.
House approves the USA-PATRIOT Act, in a 357-66 vote.
House passes $100 billion economic stimulus package.
The Senate approves 98-1 (Sen. Russell Feingold, D-Wis. dissenting) the USA-PATRIOT Act.
Bush signs the USA-PATRIOT Act into law.
"American Taliban" John Walker Lindh is taken into U.S. custody in Afghanistan.
Israel restricts Palestinian leader Yasser Arafat's movements.
The Pentagon releases an amateur videotape of bin Laden boasting about his role in planning the Sept. 11 attacks.
Richard Reid, 28, allegedly tries to ignite an explosive in his sneaker while on an American Airlines flight from Paris to Miami.
Bush's Arab-American Secret Service agent is removed from an American Airlines flight. The airline claims the agent was "not behaving appropriately."
Jan. 11, 2002:
The first 20 Taliban and al-Qaeda prisoners of war arrive at the Guantanamo Bay U.S. naval base in Cuba.
Wall Street Journal reporter Daniel Pearl is kidnapped in Karachi, Pakistan.
Ashcroft announces the new Justice Department program, Operation TIPS, which asks Americans to report suspicious activity about each other.
Ridge unveils a new color-coded national threat alert system (red, orange, yellow, blue, green) to better prepare Americans for potential terrorist attacks.
Israeli military offensive begins in the West Bank.
About 100 European and American peace activists enter Arafat's compound in Ramallah.
U.S. officials announce the capture of Osama bin Laden's top deputy, Abu Zubaydah.
After 34 days of confinement in his West Bank headquarters, Arafat is released in a U.S.-brokered deal.
The New York Times reports that an FBI memo last summer urged bureau headquarters to investigate Middle Eastern men enrolled in American flight schools.
Senior Bush administration officials say that his daily intelligence briefings in the weeks before the 9/11 attacks included a warning that the al-Qaeda network would attempt to hijack a U.S.-based airliner.
Bush says he opposes establishing a special commission to probe how the government dealt with terror warnings before 9/11.
FBI Chief Mueller acknowledges that his agency missed warning signals on terrorism.
Abdulla al Mujahir, 31, aka Jose Padilla, is arrested on suspicion of plotting to detonate a radioactive "dirty" bomb in a U.S. attack.
The House votes to create a $38 billion Department of Homeland Security.
The Senate Foreign Relations Committee begins hearings on the possibility of invading Iraq.
U.S. District Judge Gladys Kessler rules that the government must release the names of the nearly 1,200 people the U.S. detained after the 9/11 attacks.
The White House rejects an Iraqi offer to let members of Congress tour suspected biological, chemical and nuclear weapons sites.
U.S. Airways files for Chapter 11 bankruptcy protection.
The New York City medical examiner releases the first comprehensive account of 2,819 victims killed at the WTC on Sept. 11, a list to be read at the one-year observance.