This is a US History question The 911 hijackers used fullylo

This is a U.S History question:

The 9/11 hijackers used fully-loaded airliners as weapons of war. Analyze the impact of 9/11 and terrorism on aviation in America. What have been the social, political, and economic effects of terrorism on commercial air travel and general aviation?

Solution

Air Space Closed: On September 10, 2001, US airports handled 38,047 flights. On September 12, they handled 252 commercial flights. One week later (September 18) there were 34,743 flights.1
• Passenger Traffic: US passenger traffic, measured by revenue passenger kilometers (number of travelers multiplied by the distance traveled) declined 5.9% in 20012 (compared to 2000) and a further 1.4% in 2002. Airlines struggled to match this decline by cutting capacity (available seat kilometers or number of seats multiplied by distance traveled) by 2.8% in 2001 and a further 3.9% in 2002. This was the first time since World War II that industry capacity declined for two consecutive years. After stabilizing in 2003, capacity growth resumed in 2004 and continued until 2008, when it declined again owing to soaring oil prices and the global financial crisis. Capacity fell further in 2009, returning virtually to 2000 levels. Between 2000 and 2009, the US commercial aircraft fleet shrank by around 700 units.

In addition to the casualties and physical destruction directly
caused by their attacks, terrorists seek to inflict wider psychological,
social, political, and economic damage upon the
societies they target.
Terrorists can hope to harm economies in various indirect
ways. These include:
Reducing consumers’ and firms’ expectations for the future
Forcing governments and the private sector to invest in
security measures, which reduce efficiency in vulnerable
industries (such as transportation and trade) and redirect
investment away from more productive economic uses
Altering behavior by inducing economic actors (consumers,
investors, businesses) to avoid areas of perceived
risk (either sectors, such as aviation or tourism, or geographic
areas affected by terrorism)
Triggering wider geopolitical conflict, which may cause
further economic disruptions
This paper examines the actual macroeconomic