How the 9/11 Attacks Affect the Economy Today

What Is Their Lasting Damage?

Twin Towers Of Light Shine Over New York On 9/11 Anniversary
••• Twin towers of light shine over New York on 9/11 anniversary. Photo: Michael Bocchieri/Getty Images News/Getty Images

The 9/11 attacks had both immediate and long-term economic impacts, some of which continue to this day. The attacks caused the Dow to drop more than 600 points and the 2001 recession to deepen. It also led to the War on Terror, one of the most prominent government spending programs in U.S. history.

9/11 Attack Facts

On the morning of September 11, 2001, 19 terrorists hijacked four planes at Boston's Logan airport. They chose planes headed for the West Coast because they would be loaded with fuel. They planned to cripple the U.S. economy by destroying three centers of power: Wall Street, the Pentagon, and the White House.

The first two planes hit their targets. American Airlines Flight 11 crashed into Tower One of the World Trade Center at 8:46 a.m. United Airlines Flight 175 crashed into Tower Two at 9:03 a.m. At 10:05 a.m., millions of television viewers saw Tower Two collapse. Tower One collapsed from the top down at 10:28 a.m. Tower Seven collapsed at 5:20 p.m.

American Airlines Flight 77 crashed into the Pentagon at 9:37 a.m. Portions of the building collapsed at 10:10 a.m.

United Airlines Flight 93 never made it to its target, the White House. At 9:23 a.m., after the World Trade Tower crash, dispatcher Ed Ballinger texted all flights he was following, including Flight 93. He said, "Beware any cockpit intrusion two a/c hit World Trade Center." Five minutes later, the terrorists killed the pilots and took control of the plane.

By that time, at least 10 of the passengers had talked to loved ones via cell phone. They heard about the World Trade Tower attacks and figured out their likely fate. At 9:57, the brave passengers attacked the terrorists. Flight 93 crashed into a field in Shanksville, Pennsylvania at 10:03 a.m., killing all 30 people aboard.

The Federal Aviation Administration shut down all New York City area airports at 9:17 a.m. President Bush announced the terrorist attack at 9:30 a.m. Ten minutes later, the FAA shut down all U.S. airports for the first time in history.

9/11 Death Toll

The total death toll of 2,975 surpassed that of Pearl Harbor in December 1941. The death toll included 2,600 people at the World Trade Center, 125 at the Pentagon, and 256 on the four planes.

2001 Recession

The stock market closed for four trading days after the attacks, the first time since the Great Depression. In March 1933, President Franklin D. Roosevelt closed the markets for two days, as part of a bank holiday to prevent a run on the banks. The stock market reopened on September 17, 2001. The Dow promptly fell 7.13 percent, closing at 8,920.70. The 617.78-point loss was the Dow's worst one-day drop at that time.

The 9/11 attacks worsened the 2001 recession, which had begun in March 2001. The economy had contracted 1.1 percent in the first quarter but had bounced up 2.1 percent in the second quarter. The attacks made the economy contract 1.3 percent in the third quarter, extending the recession. The Y2K scare caused the 2001 recession. It created a boom and subsequent bust in internet businesses.

Although the recession ended in November 2001, the threats of war drove the Dow down for another year. It hit bottom on October 9, 2002, when it closed at 7,286.27. That was a 37.8 percent decline from its peak. No one knew for sure if the bull market had resumed until the Dow hit a higher low March 11, 2003, closing at 7,524.06. Unemployment continued to climb until June 2003, when it reached 6 percent. That was the peak of that recession.

War on Terror

On September 20, 2001, President Bush called for a War on Terror. He said, “Americans should not expect one battle but a lengthy campaign, unlike any other we have ever seen.” Then he put it into action.

Bush launched the War in Afghanistan to find and bring to justice Osama bin Laden. He was the head of the al-Qaida organization that launched the 9/11 attacks. In its first year, Congress appropriated $29.3 billion in emergency funding for the war.

On March 21, 2003, President Bush sent troops into Iraq. He said the Central Intelligence Agency had found weapons of mass destruction. He added that Iraq's leader, Saddam Hussein, was aiding al-Qaida operatives. Congress appropriated $36.7 billion in emergency funding for the War in Iraq in its first year.

The costs for both wars kept mounting. By the end of Bush's two terms in office, the War on Terror cost $1.164 trillion. That was added to increased spending for the Defense Department and Homeland Security. President Obama spent $807 billion during his two terms. President Trump budgeted $156 billion. That brought the cost of the War on Terror to $2.126 trillion.

Debt Crisis

The most significant economic impact of the 9/11 attacks was how the increased defense spending led to the U.S. debt crisis. Without the War on Terror, the debt would be $17 trillion or less. That’s $19 trillion total debt, at present, minus $2 trillion. That's just 93 percent of the country’s economic output. The U.S. gross domestic product was $18.625 trillion in 2016. This total is still higher than the 77 percent debt-to-GDP tipping point recommended by the World Bank. But it's much better than the actual 103 percent level.


The War on Terror reduced funds for stimulus programs to boost the country out of the 2008 financial crisis. Fewer jobs were created, which meant less tax revenue and a further increase of debt. That also meant less funding for infrastructure repair and replacement.

High debt levels became a crisis in 2011 when tea party Republicans balked at raising the debt ceiling. Instead of cutting military spending, they called for severely limiting Medicare benefits. That led to the first-ever downgrade of U.S. debt by Standard and Poor's.

In 2013, they again refused to raise the debt ceiling or fund the government. It led to a 16-day government shutdown and global fears that the United States would default. Instead of focusing on job creation, they focused on austerity measures. That kept economic growth lackluster.  The U.S. debt crisis has continued. Democrats and Republicans accuse each other about increasing the debt when they are out of power. But they both continue to spend when they are in control of Congress.