September 15th

Lehman Brothers file for Chapter 11 bankruptcy protection. Lehman Brothers Holdings Inc. filed for bankruptcy protection. This was the largest bankruptcy in US history.
Lehman Brothers
President George W. Bush, addressing the nation from storm-ravaged New Orleans, acknowledged the government failed to respond adequately to Hurricane Katrina and urged Congress to approve a massive reconstruction program.
Presidency of George W. Bush
National Hockey League owners agreed to lock out the players. (The 2004-05 season was eventually canceled.).
2004–05 NHL lockout
President George W. Bush identified Osama bin Laden as the prime suspect in the Sept. 11 terrorist attacks, and told Americans to prepare for a long, difficult war against terrorism.
Responsibility for the September 11 attacks
The Summer Olympics opened in Sydney, Australia.
2000 Summer Olympics
Pulitzer Prize-winning author Robert Penn Warren, the first poet laureate of the United States, died.
Robert Penn Warren
The first edition of the USA Today newspaper was published.
USA Today
John Bull becomes the oldest operable locomotive. The steam locomotive manufactured by the British and operated in New Jersey, US became the world's oldest and still operable locomotive when the Smithsonian operated it on this day. It was first put to use on September 15, 1831.
John Bull (locomotive)
A Ku Klux Klan bomb kills 4 young African-American girls. 4 members of the white supremacy group, set off a timed bomb at the 16th Street Baptist Church, a predominantly black church in Birmingham, Alabama. The bombings marked a watershed moment in the Civil Rights Movement in America.
16th Street Baptist Church bombing
During the Korean War, United Nations forces landed at Inchon in the south and began their drive toward Seoul.
The Royal Air Force inflicted heavy losses on the Luftwaffe as the tide turned in the Battle of Britain during World War II.
Operational history of the Luftwaffe (1939–45)
Nuremberg laws instituted by the Nazi party are put into force. The laws revoked citizenship for Jews, forbade them from having relationships with people of non-Jewish origin and made the swastika the official symbol of Germany.
Nuremberg Laws
Scottish bacteriologist Alexander Fleming discovers penicillin while studying influenza.
Russia was proclaimed a republic by Alexander Kerensky, the head of a provisional government.
Russian Provisional Government
First use of tanks in warfare, "Little Willies" at Battle of Flers-Courcelette, part of the Battle of the Somme.
Battle of Pyongyang ends with decisive Japanese victory. The battle was a major land battle took place between the forces of Meiji Japan and Qing China during the First Sino-Japanese War.
Battle of the Yalu River (1894)
William Howard Taft, the 27th president who later served as chief justice, was born in Cincinnati, Ohio.
President William Howard Taft
HMS Beagle with Charles Darwin on board reaches the Galapagos Islands.
Second voyage of HMS Beagle
Act of Independence of Central America: Costa Rica, El Salvador, Guatemala, Honduras & Nicaragua declare their independence from the Spanish Empire.
Act of Independence of Central America
The U.S. Department of Foreign Affairs changed its name to the Department of State.
United States Department of State
British forces occupied New York City during the American Revolution.
History of New York City (1665–1783)
Mayflower departs from Plymouth England with 102 pilgrims [OS May 8].
Mayflower Compact
First non-aristocratic, free public school in Europe is opened in Frascati, Italy.
September 15