After the terrorist attacks of September 11, 2001, the security industry in the United States changed significantly. The attacks led to an increased focus on security and a need for new and innovative ways to protect people and property. The security industry responded by developing new technologies and approaches to security.

The 9/11 attacks also led to changes in the way the security industry operates. The attacks highlighted the need for better coordination and communication between different security agencies and organizations. The security industry has responded by developing new standards and protocols for information sharing and cooperation.

These attacks also spurred the development of new laws and regulations governing the security industry. The USA PATRIOT Act, passed in 2000, significantly expanded the powers of the government to investigate and prosecute terrorist acts. The Homeland Security Act, passed in 2002, created the Department of Homeland Security, which has responsibility for coordinating the nation’s security efforts.

Furthermore, they led to a significant increase in funding for the security industry. The federal government has increased its investment in security research and development, and many private companies have also increased their security budgets. This increase in funding has resulted in the development of new technologies and approaches to security.

It is important to note that these attacks also led to an increase in public awareness of security issues. The media coverage of the attacks raised the profile of security risks and prompted many people to take steps to protect themselves and their property. The increased public awareness of security issues has led to new demand for security products and services.

The 9/11 attacks were a turning point for the security industry. The attacks led to changes in the way the industry operates, new laws and regulations, increased funding, and higher public awareness of security risks. These changes have resulted in new technologies and approaches to security.

The attacks of September 11, 2001, had a profound and lasting impact on the United States. In addition to the devastating loss of life, the attacks also resulted in significant changes to the country's security infrastructure. Prior to 9/11, acts of terrorism on U.S. soil were not met with such widespread changes. For example, after the 1995 bombing in Oklahoma City involving Timothy McVeigh, security changes were limited. However, the 9/11 attacks resulted in a much more significant reaction. The increased dollars expended and the increased legislative and bureaucratic restrictions levied on the American people post-9/11 are worth the lives and property that are potentially saved.

The total expenditure on security increased after the 9/11 Attacks has been reported to be $145-160 billion per annum. $150 million were pledged right away after the attack in the form of the Telethon Fund which allowed the government to give relief to the victim’s families. Many terrorist organizations have also been eliminated since then, thanks to the increased expenditure and focus on American safety.

In my opinion, these changes in security are warranted in order to prevent future attacks of such magnitude. This is because the 9/11 attacks showed that there are people who are willing to go to great lengths to harm the United States. As a result, it is necessary to take measures that will make it more difficult for potential attackers to succeed. While these changes may be inconvenient for some, I believe they are necessary in order to keep the country safe.