The events of September 11, 2001, set in motion sweeping changes to U.S. intelligence and counterterrorism practices, launched two major wars, and altered Americans’ daily routines. This timeline tra…

The Democratic Republic of Congo has been subjected to centuries of international intervention by European powers, as well as its African neighbors. This timeline traces the role of the outside forces that have beleaguered eastern Congo since the end of the colonial era.

In March 2003, U.S. forces invaded Iraq vowing to destroy Iraqi weapons of mass destruction (WMD) and end the dictatorial rule of Saddam Hussein. When WMD intelligence proved illusory and a violent insurgency arose, the war lost public support. Saddam was captured, tried, and hanged and democratic elections were held. In the years since, there have been over 4,700 U.S. and allied troop deaths, and more than one hundred thousand Iraqi civilians have been killed. Meanwhile, questions linger over Iraq's fractious political situation.

The financial meltdown that started with the bursting of the U.S. housing bubble had worldwide economic repercussions, including recessions, far-reaching regulations, and deep-seated political discontent. Track its buildup and aftermath.

Since 1992, negotiations have produced notable accords on climate change, including the Paris Agreement. But leaders have so far failed to slow global warming. Trace the successes and failures of UN climate conferences ahead of COP26.