Sept. 20, 1881: Chester Arthur was sworn in as the 21st president, after President James Garfield died from an assassin's bullet. Garfield was shot 10 weeks earlier as he prepared to board a train in Washington.

Sept. 20, 2001: Nine days after the Sept. 11 attacks, President George W. Bush declared a global war on terrorism. "We're not deceived by their pretenses to piety," he said, speaking of Islamic terrorists. "Americans should not expect one battle, but a lengthy campaign unlike any other we have ever seen." He warned: "Any nation that continues to harbor or support terrorism will be regarded by the United States as a hostile regime."

Bush continued: "I know there are struggles ahead and dangers to face. But this country will define our times, not be defined by them."

Sept. 20, 2007: Citing "unsettling times," President Bush assured Americans that the U.S. economy was in good shape, despite worries of a recession. The housing market in the United States had collapsed the year before; it would eventually destroy more than $7 trillion in wealth for Americans and helped spark the "Great Recession" and near collapse of the U.S. economy.

Quote of the Day:

"Every nation in every region now has a decision to make. Either you are with us, or you are with the terrorists." — George W. Bush

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