September 11, 2001 marked the most horrific day in history for the United States of America. The events of this day forever changed the lives of those residing in America. The United States was considered somewhat safe from terrorist attacks. However, all this came to an abrupt end when 19 militants known to be part of the terrorist group Al-Qaeda hijacked four planes with the aim of destroying targeted areas in the United States. Following the deadly attack on the United States, security measures changed dramatically. While safety measures have been implemented across the United States, extreme caution has gone into effect. All departments have examined various measures to improve the prevention of terrorist attacks. The U.S. Department of Homeland Security, Air Force, and Customs and Immigration were some of the major areas that changed their security measures. Tuesday, September 11, 2001 will forever be in the minds of Americans everywhere, especially those in the United States. At approximately 8:45 am in New York City, the American Airlines Boeing 767 crashed into the north tower of the World Trade Center (History.com, 2014). The plane crashed into the 80th floor of the World Trade Center. Many people died instantly following the crash. Unfortunately, less than 20 minutes later, another United Airlines Boeing 767 crashed into the south tower of the 60th floor of the World Trade Center. Once again, the impact of the second crash killed many people. Those who were not killed immediately remained trapped on the upper floors with little or no chance of survival. The two planes also landed burning debris on surrounding buildings (History.com, 2014). America had no idea that those two planes crashed... middle of paper... on the 11th of 2001 on aviation. Retrieved from http://www.iata.org/pressroom/documents/impact-9-11-aviation.pdf U.S. Citizenship and Immigration Services. (2013). After September 11th. Retrieved from http://www.uscis.gov/history-and-genealogy/our-history/agency-history/post-911 US Customs and Border Protection. (n.d.). Border Patrol Overview. Retrieved from http://www.cbp.gov/border-security/along-us-borders/overview US Customs and Border Protection. (n.d.). Border Patrol Strategic Plan 2012-2016. http://nemo.cbp.gov/obp/bp_strategic_plan.pdf US Department of Homeland Security. (n.d.). About dhs. Retrieved from http://www.dhs.gov/about-dhs United States Government of Accountability Office. (2011). Department of Homeland Security: Progress made and work remaining in implementing homeland security missions 10 years after 9/11. Retrieved from http://www.gao.gov/products/GAO-11-881