A year unlike any other for the Dow

Sept. 11: Terrorists destroy the World Trade Center towers, hit the Pentagon and crash an airliner in rural Pennsylvania.

Sept. 21: After a four-day shutdown, Wall Street winds up one of its worst weeks ever. Dow Jones Industrial Average drops 14.3%; Nasdaq Composite Index loses 16%; Standard & Poor’s 500 stock index falls 11.6%.

Oct. 7: U.S.-led forces invade Afghanistan.

Oct. 26: President Bush signs USA Patriot Act of 2001. Financial services companies join the war on terrorism.

Nov. 14: Merrill Lynch & Co. Inc. analyst Henry Blodget, poster boy for the technology bubble, calls it quits.

Dec. 2: Enron Corp. files for Chapter 11 bankruptcy; lays off thousands of employees.

Dec. 7: Five-year rule of Taliban ends.

Jan. 23: Shredding exposed at Arthur Andersen LLP’s Houston office.

Jan. 28: Global Crossing Ltd. files for bankruptcy.

Feb. 12: Former Enron chairman Kenneth Lay takes Fifth before a Senate committee.

March 14: Arthur Andersen LLP indicted for obstruction of justice.

April 30: Bernard J. Ebbers, who built WorldCom Inc. into the nation’s second-largest long-distance carrier, resigns as chief executive.

May 21: Merrill Lynch agrees to pay $100 million to settle N.Y. Attorney General Eliot L. Spitzer’s investigation into analyst conflicts.

May 30: World Trade Center cleanup ends.

June 3: L. Dennis Kozlowski resigns at Tyco International Ltd. amid allegations of tax evasion.

June 15: Houston jury convicts Arthur Andersen.

June 19: Afghan President Hamid Karzai sworn in.

July 21: WorldCom makes the largest bankruptcy filing in U.S. history.

July 23: Dow hits lowest point since September 1998. It rallies 488 points the next day.

July 24: John J. Riggs, founder of Adelphia Communications Corp., and two sons arrested for alleged corporate malfeasance.

Aug. 8: U.S. Airways Group Inc. files for Chapter 11 bankruptcy, the first major carrier to do so since Sept. 11.

Aug. 27: U.S. commanders say Osama bin Laden is probably alive, somewhere along the Afghanistan-Pakistan border.